This glossary defines common terminology used in Google Maps Platform billing
and pricing.

## Billable event

Typically a billable event occurs when your application receives the data from
the Google Maps Platform service that your integration *triggered* . In most
cases, a billable event occurs when the data is *returned* from the service,
but in some cases, a billable event occurs with a specific kind of request,
whether or not the data is returned.

Following are some example billable events:

- A successful map load
- A destination request in the Navigation SDK
- The successful return of a 2D Map tile
- A session that ends with a request
- The return of a specific field due to a field mask in the request

For more example of billable events, see [SKU Details](https://developers.google.com/maps/billing-and-pricing/sku-details.md.txt).

See also: [Trigger](https://developers.google.com/maps/billing-and-pricing/gmp-pricing-glossary.md.txt#trigger), [SKU](https://developers.google.com/maps/billing-and-pricing/gmp-pricing-glossary.md.txt#sku).

## Call

See [Request](https://developers.google.com/maps/billing-and-pricing/gmp-pricing-glossary.md.txt#request).

## Category

SKU categories based on features that cater to different business
needs and usage patterns. See
[Essentials, Pro, and Enterprise categories](https://developers.google.com/maps/billing-and-pricing/overview.md.txt#pricing-categories).

## Cost

The money charged for the use of an API based on what SKU an application or
website triggers and the pricing tier for the volume of use of
the API. See also [Pricing tier](https://developers.google.com/maps/billing-and-pricing/gmp-pricing-glossary.md.txt#pricing-tier) or [trigger](https://developers.google.com/maps/billing-and-pricing/gmp-pricing-glossary.md.txt#trigger).

## Endpoint

See [API Endpoint Service](https://google.aip.dev/9#api-service-endpoint)
in the AIP Glossary. See also [SKU](https://developers.google.com/maps/billing-and-pricing/gmp-pricing-glossary.md.txt#sku).

## Field mask

A list of the fields you want the service to return, which streamlines cost
and latency for a request.

## Pricing tier

Pricing based on your monthly usage volume. See [Pricing](https://developers.google.com/maps/billing-and-pricing/pricing.md.txt).

## Product

See [API product](https://google.aip.dev/9#api-product) in the AIP glossary.
See also [SKU](https://developers.google.com/maps/billing-and-pricing/gmp-pricing-glossary.md.txt#sku).

## Query

See [Request](https://developers.google.com/maps/billing-and-pricing/gmp-pricing-glossary.md.txt#request).

## Request

An operation in which your application issues a method to our servers,
sometimes with field masks or other parameters, and our system receives that
message and returns a data response. The size of the response can vary
depending on the nature of your request.

## SKU

The name that corresponds to a billable event. A SKU is the label that
you see on your billing statement.

See also: [Billable event](https://developers.google.com/maps/billing-and-pricing/gmp-pricing-glossary.md.txt#billable-event) and
[Trigger](https://developers.google.com/maps/billing-and-pricing/gmp-pricing-glossary.md.txt#trigger).

## Trigger

An API method, class, field mask, request, or related constraint that
results in a [billable event](https://developers.google.com/maps/billing-and-pricing/gmp-pricing-glossary.md.txt#billable-event).

## Usage

How many billable events you incur for a given SKU. See also
[Billable event](https://developers.google.com/maps/billing-and-pricing/gmp-pricing-glossary.md.txt#billable-event) and [SKU](https://developers.google.com/maps/billing-and-pricing/gmp-pricing-glossary.md.txt#sku).

## Usage level

The volume of use, measured by how many times a billable event is triggered
in a month. See also [billable event](https://developers.google.com/maps/billing-and-pricing/gmp-pricing-glossary.md.txt#billable-event) and
[trigger](https://developers.google.com/maps/billing-and-pricing/gmp-pricing-glossary.md.txt#trigger). The cost for each level is shown in columns in the
pricing sheets: [Main pricing](https://developers.google.com/maps/billing-and-pricing/pricing.md.txt) and [India pricing](https://developers.google.com/maps/billing-and-pricing/pricing-india.md.txt).