Review snippet

A review snippet is a short excerpt of a review or a rating from a review website, usually an average of the combined rating scores from many reviewers. When Google finds valid reviews or ratings markup, we may show a rich snippet that includes stars and other summary info from reviews or ratings. In addition to the text of the review, a rating is an evaluation described on a numeric scale (such as 1 to 5). Review snippets may appear in rich results or Google Knowledge Panels. You can supply ratings for the following content types:

Google also supports reviews for the following schema.org types:

Try it out

There are several ways you can add review structured data to a page:

Add a simple review.
Nest a review into another schema.org type using its review property.
Add aggregate ratings. You can omit the rating for an individual review if your marked-up content contains both an author and a review date. For aggregate reviews, you must supply the average rating for the rich snippet to display.
Nest aggregate ratings into another schema.org type using its aggregateRating property.

Simple review

Here's an example of a simple review that you can copy and paste to your own HTML page.

JSON-LD

<html>
  <head>
  <title>Legal Seafood</title>
    <script type="application/ld+json">
    {
      "@context": "https://schema.org/",
      "@type": "Review",
      "itemReviewed": {
        "@type": "Restaurant",
        "image": "http://www.example.com/seafood-restaurant.jpg",
        "name": "Legal Seafood",
        "servesCuisine": "Seafood",
        "priceRange": "$$$",
        "telephone": "1234567",
        "address" :{
          "@type": "PostalAddress",
          "streetAddress": "123 William St",
          "addressLocality": "New York",
          "addressRegion": "NY",
          "postalCode": "10038",
          "addressCountry": "US"
        }
      },
      "reviewRating": {
        "@type": "Rating",
        "ratingValue": "4"
      },
      "name": "A good seafood place.",
      "author": {
        "@type": "Person",
        "name": "Bob Smith"
      },
      "reviewBody": "The seafood is great.",
      "publisher": {
        "@type": "Organization",
        "name": "Washington Times"
      }
    }
    </script>
  </head>
  <body>
  </body>
</html>

 <html>
  <head>
  <title>Legal Seafood</title>
    <script type="application/ld+json">
    {
      "@context": "https://schema.org/",
      "@type": "Review",
      "itemReviewed": {
        "@type": "Restaurant",
        "image": "http://www.example.com/seafood-restaurant.jpg",
        "name": "Legal Seafood",
        "servesCuisine": "Seafood",
        "priceRange": "$$$",
        "telephone": "1234567",
        "address" :{
          "@type": "PostalAddress",
          "streetAddress": "123 William St",
          "addressLocality": "New York",
          "addressRegion": "NY",
          "postalCode": "10038",
          "addressCountry": "US"
        }
      },
      "reviewRating": {
        "@type": "Rating",
        "ratingValue": "4"
      },
      "name": "A good seafood place.",
      "author": {
        "@type": "Person",
        "name": "Bob Smith"
      },
      "reviewBody": "The seafood is great.",
      "publisher": {
        "@type": "Organization",
        "name": "Washington Times"
      }
    }
    </script>
  </head>
  <body>
  </body>
</html>

RDFa

<html>
  <head>
    <title>Legal Seafood</title>
  </head>
  <body>
    <div vocab="https://schema.org/" typeof="Review">
      <div property="itemReviewed" typeof="Restaurant">
        <img property="image" src="seafood-restaurant.jpg" alt="Legal Seafood"/>
        <span property="name">Legal Seafood</span>
        <span property="servesCuisine">Seafood</span>
        <span property="priceRange">$$$</span>
        <span property="telephone">1234567</span>
        <span property="address">123 William St, New York</span>
      </div>
      <span property="reviewRating" typeof="https://schema.org/Rating">
        <span property="ratingValue">4</span>
      </span> stars -
      <b>"<span property="name">A good seafood place.</span>" </b>
      <span property="author" typeof="https://schema.org/Person">
        <span property="name">Bob Smith</span>
      </span>
      <span property="reviewBody">The seafood is great.</span>
      <div property="publisher" typeof="Organization">
        <meta property="name" content="Washington Times">
      </div>
    </div>
  </body>
</html>

 <html>
  <head>
    <title>Legal Seafood</title>
  </head>
  <body>
    <div vocab="https://schema.org/" typeof="Review">
      <div property="itemReviewed" typeof="Restaurant">
        <img property="image" src="seafood-restaurant.jpg" alt="Legal Seafood"/>
        <span property="name">Legal Seafood</span>
        <span property="servesCuisine">Seafood</span>
        <span property="priceRange">$$$</span>
        <span property="telephone">1234567</span>
        <span property="address">123 William St, New York</span>
      </div>
      <span property="reviewRating" typeof="https://schema.org/Rating">
        <span property="ratingValue">4</span>
      </span> stars -
      <b>"<span property="name">A good seafood place.</span>" </b>
      <span property="author" typeof="https://schema.org/Person">
        <span property="name">Bob Smith</span>
      </span>
      <span property="reviewBody">The seafood is great.</span>
      <div property="publisher" typeof="Organization">
        <meta property="name" content="Washington Times">
      </div>
    </div>
  </body>
</html>

Microdata

<html>
  <head>
  <title>Legal Seafood</title>
  </head>
  <body>
    <div itemscope itemtype="https://schema.org/Review">
      <div itemprop="itemReviewed" itemscope itemtype="https://schema.org/Restaurant">
        <img itemprop="image" src="seafood-restaurant.jpg" alt="Legal Seafood"/>
        <span itemprop="name">Legal Seafood</span>
        <span itemprop="servesCuisine">Seafood</span>
        <span itemprop="priceRange">$$$</span>
        <span itemprop="telephone">1234567</span>
        <span itemprop="address">123 William St, New York</span>
      </div>
      <span itemprop="reviewRating" itemscope itemtype="https://schema.org/Rating">
        <span itemprop="ratingValue">4</span>
      </span> stars -
      <b>"<span itemprop="name">A good seafood place.</span>" </b>
      <span itemprop="author" itemscope itemtype="https://schema.org/Person">
        <span itemprop="name">Bob Smith</span>
      </span>
      <span itemprop="reviewBody">The seafood is great.</span>
      <div itemprop="publisher" itemscope itemtype="https://schema.org/Organization">
        <meta itemprop="name" content="Washington Times">
      </div>
    </div>
  </body>
</html>

 <html>
  <head>
  <title>Legal Seafood</title>
  </head>
  <body>
    <div itemscope itemtype="https://schema.org/Review">
      <div itemprop="itemReviewed" itemscope itemtype="https://schema.org/Restaurant">
        <img itemprop="image" src="seafood-restaurant.jpg" alt="Legal Seafood"/>
        <span itemprop="name">Legal Seafood</span>
        <span itemprop="servesCuisine">Seafood</span>
        <span itemprop="priceRange">$$$</span>
        <span itemprop="telephone">1234567</span>
        <span itemprop="address">123 William St, New York</span>
      </div>
      <span itemprop="reviewRating" itemscope itemtype="https://schema.org/Rating">
        <span itemprop="ratingValue">4</span>
      </span> stars -
      <b>"<span itemprop="name">A good seafood place.</span>" </b>
      <span itemprop="author" itemscope itemtype="https://schema.org/Person">
        <span itemprop="name">Bob Smith</span>
      </span>
      <span itemprop="reviewBody">The seafood is great.</span>
      <div itemprop="publisher" itemscope itemtype="https://schema.org/Organization">
        <meta itemprop="name" content="Washington Times">
      </div>
    </div>
  </body>
</html>

Nested review

Here's an example of a review that's nested in a Product. You can copy and paste the example to your own HTML page.

JSON-LD

<html>
  <head>
    <title>The Catcher in the Rye</title>
    <script type="application/ld+json">
    {
      "@context": "https://schema.org/",
      "@type": "Product",
      "brand": {
        "@type": "Brand",
        "name": "Penguin Books"
      },
      "description": "The Catcher in the Rye is a classic coming-of-age story: an story of teenage alienation, capturing the human need for connection and the bewildering sense of loss as we leave childhood behind.",
      "sku": "9780241984758",
      "mpn": "925872",
      "image": "http://www.example.com/catcher-in-the-rye-book-cover.jpg",
      "name": "The Catcher in the Rye",
      "review": {
        "@type": "Review",
        "reviewRating": {
          "@type": "Rating",
          "ratingValue": "5"
        },
        "author": {
          "@type": "Person",
          "name": "John Doe"
        },
        "reviewBody": "I really enjoyed this book. It captures the essential challenge people face as they try make sense of their lives and grow to adulthood."
      },
      "aggregateRating": {
        "@type": "AggregateRating",
        "ratingValue": "88",
        "bestRating": "100",
        "ratingCount": "20"
      },
      "offers": {
        "@type": "Offer",
        "url": "https://example.com/offers/catcher-in-the-rye",
        "priceCurrency": "USD",
        "price": "5.99",
        "priceValidUntil": "2020-11-05",
        "itemCondition": "https://schema.org/UsedCondition",
        "availability": "https://schema.org/InStock",
        "seller": {
          "@type": "Organization",
          "name": "eBay"
        }
      }
    }
    </script>
  </head>
  <body>
  </body>
</html>

Show me the example

 <html>
  <head>
    <title>The Catcher in the Rye</title>
    <script type="application/ld+json">
    {
      "@context": "https://schema.org/",
      "@type": "Product",
      "brand": {
        "@type": "Brand",
        "name": "Penguin Books"
      },
      "description": "The Catcher in the Rye is a classic coming-of-age story: an story of teenage alienation, capturing the human need for connection and the bewildering sense of loss as we leave childhood behind.",
      "sku": "9780241984758",
      "mpn": "925872",
      "image": "http://www.example.com/catcher-in-the-rye-book-cover.jpg",
      "name": "The Catcher in the Rye",
      "review": {
        "@type": "Review",
        "reviewRating": {
          "@type": "Rating",
          "ratingValue": "5"
        },
        "author": {
          "@type": "Person",
          "name": "John Doe"
        },
        "reviewBody": "I really enjoyed this book. It captures the essential challenge people face as they try make sense of their lives and grow to adulthood."
      },
      "aggregateRating": {
        "@type": "AggregateRating",
        "ratingValue": "88",
        "bestRating": "100",
        "ratingCount": "20"
      },
      "offers": {
        "@type": "Offer",
        "url": "https://example.com/offers/catcher-in-the-rye",
        "priceCurrency": "USD",
        "price": "5.99",
        "priceValidUntil": "2020-11-05",
        "itemCondition": "https://schema.org/UsedCondition",
        "availability": "https://schema.org/InStock",
        "seller": {
          "@type": "Organization",
          "name": "eBay"
        }
      }
    }
    </script>
  </head>
  <body>
  </body>
</html>

RDFa

<html>
  <head>
    <title>The Catcher in the Rye</title>
  </head>
  <body>
    <div vocab="https://schema.org/" typeof="Product">
      <img property="image" src="catcher-in-the-rye-book-cover.jpg" alt="Catcher in the Rye"/>
      <span property="name">The Catcher in the Rye</span>
      <div property="review" typeof="Review"> Review:
        <span property="reviewRating" typeof="Rating">
            <span property="ratingValue">5</span> -
        </span>
        <b>"<span property="name">A masterpiece of literature</span>" </b> by
        <span property="author" typeof="Person">
          <span property="name">John Doe</span></span>, written on
        <meta property="datePublished" content="2006-05-04">May 4, 2006
        <div property="reviewBody">I really enjoyed this book. It captures the essential challenge people face as they try make sense of their lives and grow to adulthood.</div>
        <span property="publisher" typeof="Organization">
            <meta property="name" content="Washington Times">
        </span>
      </div>
    </div>
  </body>
</html>

Show me the example

 <html>
  <head>
    <title>The Catcher in the Rye</title>
  </head>
  <body>
    <div vocab="https://schema.org/" typeof="Product">
      <img property="image" src="catcher-in-the-rye-book-cover.jpg" alt="Catcher in the Rye"/>
      <span property="name">The Catcher in the Rye</span>
      <div property="review" typeof="Review"> Review:
        <span property="reviewRating" typeof="Rating">
            <span property="ratingValue">5</span> -
        </span>
        <b>"<span property="name">A masterpiece of literature</span>" </b> by
        <span property="author" typeof="Person">
          <span property="name">John Doe</span></span>, written on
        <meta property="datePublished" content="2006-05-04">May 4, 2006
        <div property="reviewBody">I really enjoyed this book. It captures the essential challenge people face as they try make sense of their lives and grow to adulthood.</div>
        <span property="publisher" typeof="Organization">
            <meta property="name" content="Washington Times">
        </span>
      </div>
    </div>
  </body>
</html>

Microdata

<html>
  <head>
    <title>The Catcher in the Rye</title>
  </head>
  <body>
    <div itemscope itemtype="https://schema.org/Product">
      <img itemprop="image" src="catcher-in-the-rye-book-cover.jpg" alt="Catcher in the Rye"/>
      <span itemprop="name">The Catcher in the Rye</span>
      <div itemprop="review" itemscope itemtype="https://schema.org/Review"> Review:
        <span itemprop="reviewRating" itemscope itemtype="https://schema.org/Rating">
            <span itemprop="ratingValue">5</span> -
        </span>
        <b>"<span itemprop="name">A masterpiece of literature</span>" </b> by
        <span itemprop="author" itemscope itemtype="https://schema.org/Person">
          <span itemprop="name">John Doe</span></span>, written on
        <meta itemprop="datePublished" content="2006-05-04">May 4, 2006
        <div itemprop="reviewBody">I really enjoyed this book. It captures the essential challenge people face as they try make sense of their lives and grow to adulthood.</div>
        <span itemprop="publisher" itemscope itemtype="https://schema.org/Organization">
            <meta itemprop="name" content="Washington Times">
        </span>
      </div>
    </div>
  </body>
</html>

Show me the example

 <html>
  <head>
    <title>The Catcher in the Rye</title>
  </head>
  <body>
    <div itemscope itemtype="https://schema.org/Product">
      <img itemprop="image" src="catcher-in-the-rye-book-cover.jpg" alt="Catcher in the Rye"/>
      <span itemprop="name">The Catcher in the Rye</span>
      <div itemprop="review" itemscope itemtype="https://schema.org/Review"> Review:
        <span itemprop="reviewRating" itemscope itemtype="https://schema.org/Rating">
            <span itemprop="ratingValue">5</span> -
        </span>
        <b>"<span itemprop="name">A masterpiece of literature</span>" </b> by
        <span itemprop="author" itemscope itemtype="https://schema.org/Person">
          <span itemprop="name">John Doe</span></span>, written on
        <meta itemprop="datePublished" content="2006-05-04">May 4, 2006
        <div itemprop="reviewBody">I really enjoyed this book. It captures the essential challenge people face as they try make sense of their lives and grow to adulthood.</div>
        <span itemprop="publisher" itemscope itemtype="https://schema.org/Organization">
            <meta itemprop="name" content="Washington Times">
        </span>
      </div>
    </div>
  </body>
</html>

Aggregate rating

Here's an example of an aggregate rating that you can copy and paste to your own HTML page.

JSON-LD

Show me the example

 <html>
  <head>
    <title>Legal Seafood</title>
    <script type="application/ld+json">
    {
      "@context": "https://schema.org/",
      "@type": "AggregateRating",
      "itemReviewed": {
        "@type": "Restaurant",
        "image": "http://www.example.com/seafood-restaurant.jpg",
        "name": "Legal Seafood",
        "servesCuisine": "Seafood",
        "telephone": "1234567",
        "address" : {
          "@type": "PostalAddress",
          "streetAddress": "123 William St",
          "addressLocality": "New York",
          "addressRegion": "NY",
          "postalCode": "10038",
          "addressCountry": "US"
        }
      },
      "ratingValue": "88",
      "bestRating": "100",
      "ratingCount": "20"
    }
    </script>
  </head>
  <body>
  </body>
</html>

RDFa

Show me the example

 <html>
  <head>
    <title>Legal Seafood</title>
  </head>
  <body>
    <div vocab="https://schema.org/" typeof="AggregateRating">
      <div property="itemReviewed" typeof="Restaurant">
        <img property="image" src="seafood-restaurant.jpg" alt="Legal Seafood"/>
        <span property="name">Legal Seafood</span>
        <span property="servesCuisine">Seafood</span>
        <span property="telephone">1234567</span>
        <span property="address">123 William St, New York</span>
      </div>
      <span property="ratingValue">4.2</span> out of <span property="bestRating">5</span> stars -
      <span property="ratingCount">123</span> votes
    </div>
  </body>
</html>

Microdata

Show me the example

 <html>
  <head>
    <title>Legal Seafood</title>
  </head>
  <body>
    <div itemscope itemtype="https://schema.org/AggregateRating">
      <div itemprop="itemReviewed" itemscope itemtype="https://schema.org/Restaurant">
        <img itemprop="image" src="seafood-restaurant.jpg" alt="Legal Seafood"/>
        <span itemprop="name">Legal Seafood</span>
        <span itemprop="servesCuisine">Seafood</span>
        <span itemprop="telephone">1234567</span>
        <span itemprop="address">123 William St, New York</span>
      </div>
      <span itemprop="ratingValue">4.2</span> out of <span itemprop="bestRating">5</span> stars -
      <span itemprop="ratingCount">123</span> votes
    </div>
  </body>
</html>

Nested aggregate rating

Here's an example of an aggregate rating that's nested in a Product. You can copy and paste the example to your own HTML page.

JSON-LD

Show me the example

 <html>
  <head>
  <title>Executive Anvil</title>
  <script type="application/ld+json">
  {
    "@context": "https://schema.org/",
    "@type": "Product",
    "name": "Executive Anvil",
    "image": [
      "https://example.com/photos/1x1/photo.jpg",
      "https://example.com/photos/4x3/photo.jpg",
      "https://example.com/photos/16x9/photo.jpg"
     ],
    "brand": {
      "@type": "Thing",
      "name": "ACME"
    },
    "aggregateRating": {
      "@type": "AggregateRating",
      "ratingValue": "4.4",
      "ratingCount": "89"
    },
    "offers": {
      "@type": "AggregateOffer",
      "lowPrice": "119.99",
      "highPrice": "199.99",
      "priceCurrency": "USD"
    }
  }
  </script>
  </head>
  <body>
  </body>
</html>

RDFa

Show me the example

 <html>
  <head>
    <title>Executive Anvil</title>
  </head>
  <body>
    <div vocab="https://schema.org/" typeof="Product">
     <span property="brand">ACME</span> <span property="name">Executive Anvil</span>
     <img property="image" src="/search/docs/data-types/markup/anvil_executive.jpg" alt="Executive Anvil logo" />
     <span property="aggregateRating"
           typeof="AggregateRating">
      Average rating: <span property="ratingValue">4.4</span>, based on
      <span property="ratingCount">89</span> reviews
     </span>
     <span property="offers" typeof="AggregateOffer">
      from $<span property="lowPrice">119.99</span> to
      $<span property="highPrice">199.99</span>
      <meta property="priceCurrency" content="USD" />
     </span>
    </div>
  </body>
</html>

Microdata

Show me the example

 <html>
  <head>
    <title>Executive Anvil</title>
  </head>
  <body>
    <div itemscope itemtype="https://schema.org/Product">
      <span itemprop="brand">ACME</span> <span itemprop="name">Executive Anvil</span>
      <img itemprop="image" src="/search/docs/data-types/markup/anvil_executive.jpg" />
      <span itemprop="aggregateRating" itemscope itemtype="https://schema.org/AggregateRating">
        Average rating: <span itemprop="ratingValue">4.4</span>, based on
        <span itemprop="ratingCount">89</span> reviews
      </span>
      <span itemprop="offers" itemscope itemtype="https://schema.org/AggregateOffer">
        from $<span itemprop="lowPrice">119.99</span> to
        $<span itemprop="highPrice">199.99</span>
        <meta itemprop="priceCurrency" content="USD" />
      </span>
    </div>
  </body>
</html>

Guidelines

Your content must follow these guidelines to be eligible to appear as a rich result.

Technical guidelines

Make sure to mark up an aggregate evaluation of an item by many people with schema.org/AggregateRating. Google may display aggregate ratings as rich snippets or, for certain types of items, answers in search results.
Refer clearly to a specific product or service by nesting the review within the markup of another schema.org type, such as schema.org/Book or schema.org/Recipe, or by using a schema.org type as a value for the itemReviewed property.
Make sure the reviews and ratings you mark up are readily available to users from the marked-up page. It should be immediately obvious to users that the page has review content.
Provide review information about a specific item, not about a category or a list of items. For examples, refer to the common errors associated with list items.
If the review snippet is for a local business or an organization, you must follow these additional guidelines:
- Pages using LocalBusiness or any other type of Organization structured data are ineligible for star review feature if the entity being reviewed controls the reviews about itself. For example, a review about entity A is placed on the website of entity A, either directly in their structured data or through an embedded third-party widget.
- Ratings must be sourced directly from users.
- Don't rely on human editors to create, curate, or compile ratings information for local businesses; instead, use critic review structured data.
- Sites must collect ratings information directly from users and not from other sites.

Structured data type definitions

You must include the required properties for your structured data to display in search results. You can also include the recommended properties to add more information to your structured data, which could provide a better user experience.

Review

The full definition of Review is available at schema.org/Review.

Required properties
`author`	`Person` or `Organization` The author of the review. The reviewer’s name must be a valid name. For example, "50% off until Saturday" is not a valid name for a reviewer.
`itemReviewed`	`Thing` The item that is being reviewed. However, if the review is nested into another schema.org type using the `review` property, you can omit the `itemReviewed` property. The valid types for the reviewed item are: `Book` `Course` `CreativeWorkSeason` `CreativeWorkSeries` `Episode` `Event` `Game` `HowTo` `LocalBusiness` `MediaObject` `Movie` `MusicPlaylist` `MusicRecording` `Organization` `Product` `Recipe` `SoftwareApplication`
`itemReviewed.name`	`Text` The name of the item that is being reviewed. If the review is nested into another schema.org type using the `review` property, you still need to provide the `name` of the thing that is being reviewed. For example: { "@context": "https://schema.org/", "@type": "Game", "name": "Firefly", "review": { "@type": "Review", "reviewRating": { "@type": "Rating", "ratingValue": "5" }, "author": { "@type": "Person", "name": "John Doe" }, "reviewBody": "I really enjoyed this game. You get to capture fireflies and put them in jars." } }
`reviewRating`	`Rating` The rating given in this review. The rating can be a nested Rating or more specific subtype. The most typical subtype is AggregateRating.
`reviewRating.ratingValue`	`Number` or `Text` A numerical quality rating for the item, either a number, fraction, or percentage. (for example, "4", "60%", or "6 / 10"). If the scale is not implicit (for example, "4") a 1 to 5 scale is assumed. If another scale is intended, use `bestRating` and `worstRating`.

Recommended properties

Recommended properties
`datePublished`	`Date` The date that the review was published, in ISO 8601 date format.
`reviewRating.bestRating`	`Number` The highest value allowed in this rating system. The `bestRating` property is only required if the rating system is not on a 5-point scale. If `bestRating` is omitted, 5 is assumed.
`reviewRating.worstRating`	`Number` The lowest value allowed in this rating system. The `worstRating` property is only required if the rating system is not on a 5-point scale. If `worstRating` is omitted, 1 is assumed.

datePublished

Date

The date that the review was published, in ISO 8601 date format.

reviewRating.bestRating

Number

The highest value allowed in this rating system. The bestRating property is only required if the rating system is not on a 5-point scale. If bestRating is omitted, 5 is assumed.

reviewRating.worstRating

Number

The lowest value allowed in this rating system. The worstRating property is only required if the rating system is not on a 5-point scale. If worstRating is omitted, 1 is assumed.

AggregateRating

The full definition of AggregateRating is available at schema.org/AggregateRating.

Required properties
`itemReviewed`	`Thing` The item that is being rated. However, if the aggregate rating is nested into another schema.org type using the `aggregateRating` property, you can omit the `itemReviewed` property. The valid types for the reviewed item are: `Book` `Course` `CreativeWorkSeason` `CreativeWorkSeries` `Episode` `Event` `Game` `HowTo` `LocalBusiness` `MediaObject` `Movie` `MusicPlaylist` `MusicRecording` `Organization` `Product` `Recipe` `SoftwareApplication`
`itemReviewed.name`	`Text` The name of the item that is being reviewed. If the review is nested into another schema.org type using the `review` property, you still need to provide the `name` of the thing that is being reviewed. For example: { "@context": "https://schema.org/", "@type": "Game", "name": "Firefly", "aggregateRating": { "@type": "AggregateRating", "ratingValue": "88", "bestRating": "100", "ratingCount": "20" } }
`ratingCount`	`Number` The total number of ratings for the item on your site. At least one of `ratingCount` or `reviewCount` is required.
`reviewCount`	`Number` Specifies the number of people who provided a review with or without an accompanying rating. At least one of `ratingCount` or `reviewCount` is required.
`ratingValue`	`Number` or `Text` A numerical quality rating for the item, either a number, fraction, or percentage. (for example, "4", "60%", or "6 / 10"). If the scale is not implicit (for example, "4") a 1 to 5 scale is assumed. If another scale is intended, use `bestRating` and `worstRating`.

Recommended properties

Recommended properties
`bestRating`	`Number` The highest value allowed in this rating system. The `bestRating` property is only required if the rating system is not a 5-point scale. If `bestRating` is omitted, 5 is assumed.
`worstRating`	`Number` The lowest value allowed in this rating system. The `worstRating` property is only required if the rating system is not a 5-point scale. If `worstRating` is omitted, 1 is assumed.

bestRating

Number

The highest value allowed in this rating system. The bestRating property is only required if the rating system is not a 5-point scale. If bestRating is omitted, 5 is assumed.

worstRating

Number

The lowest value allowed in this rating system. The worstRating property is only required if the rating system is not a 5-point scale. If worstRating is omitted, 1 is assumed.