IssueTracker

Does this feature request already exist in the tracker?

• Yes
• No

Identify the developer feature that is most relevant to your feature request:

• Data API
• Admin API
• Measurement Protocol
• BigQuery Export

Briefly describe the feature request. If end users will interact with this feature, describe the interaction and expected outcome.

• The metro field is supported and served by Data API for Core Reporting queries.
• Context: this field is accessible in Universal Analytics and is also accessible for GA4 data only if exported via GA4 Export connector to BigQuery. It's not available first class via the Data API.

(Optional) How does this feature request affect Google Analytics users that use your application.

• They'll be able to integrate and leverage GA4 data in our platform.

(Optional) How does this feature request affect Google Analytics developers.

• Right now, the only geographical field returned by Data API is city.
• Various platforms use different boundaries for city definitions so it's impossible to programmatically leverage data across platforms. A city can also belong to multiple metros/DMA's, so an aggregation will be imperfect.
• Because metro/DMA is a standard consumed by many platforms, developers are able to integrate data across multiple platforms to get a full picture of their data.