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More Information

Serving > Result Biasing

Use the Serving > Result Biasing page to perform the following tasks:

The search appliance ranks the documents that it finds in response to a user search query by calculating a score for each document. The score reflects the probable relevance of the document content and determines the order in which results appear on the search results page. To influence search appliance rankings, use a result biasing policy. A default result biasing policy (default_policy) is built into the search appliance. You can use default_policy, or create one or more custom result biasing policies.

Before Starting these Tasks

Before you create a result biasing policy, identify the front end where you want to use it. If you only use the default_frontend, determine if you want to use a result biasing policy in it. If you only want to use a result biasing policy for a specific group of end users, you must create a front end for this group of end users. To create a front end, use the Serving > Front Ends page.

Creating a New Result Biasing Policy

To create a new result biasing policy:

  1. Click Serving > Result Biasing.
  2. In the Result Biasing Name text box, enter a name for the new result biasing policy.
    Result biasing policy names can be up to 200 characters long and can contain only alphanumeric characters, underscores, and hyphens. A name cannot begin with a hyphen.
  3. Click Create Policy.

Editing a Result Biasing Policy

Editing a result biasing policy lets you configure the following options:

  • Source Biasing--enables you to increase or decrease a document's score when it belongs to a specified collection or its URL matches a specified pattern.
  • Date Biasing--enables you to increase the score of more recent documents relative to older documents.
  • Metadata Biasing--enables you to increase or decrease a document's score when it contains a <meta> tag that matches a specified name:content pair

To edit a result biasing policy:

  1. Click Serving > Result Biasing.
  2. Click the Edit link next to the result biasing policy you want to edit.
  3. Make changes to the result biasing policy using the Serving > Result Biasing > Edit page.

Deleting a Result Biasing Policy

To delete a result biasing policy:

  1. Click Serving > Result Biasing.
  2. Click the Delete link next to the result biasing policy you want to delete.
    A confirmation box appears.
  3. Click OK.

Subsequent Task

Result biasing is disabled by default After you create and edit a result biasing policy, enable it for a front end.

To enable result biasing:

  1. Click Serving > Front Ends and click Edit for a particular front end.
  2. In the Result Biasing Policy text box, select a result biasing policy name.
  3. Click Save Settings.

Limitations

  • Result biasing is a relative measure and therefore, a URL pattern/document cannot be ranked at a particular level in the search results page.
  • Ranking of results is also affected by other factors, such as click boost (a measure of number of clicks received by a particular URL). Therefore, for a document/URL pattern influenced by result biasing, the search appliance adjusts the document's score based on the result biasing configuration as well as its click boost value.

For More Information

For detailed information about result biasing, see "Using Result Biasing to Influence Result Ranking" in "Creating the Search Experience: Best Practices," which is linked to the public Google Search Appliance documentation page.

 


 
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