The Audience API was launched as part of v4 of the Ads API and with it, brings several improvements to the legacy Audiences endpoints.

The Twitter Audience Platform (TAP) is a network where advertisers can expand the reach of their campaigns beyond Twitter through devices served by MoPub. Conversion tracking on TAP through the API works much like Twitter conversion tracking does.

For expression_rule_user_list, there's an additional distinction to make. By default, Google Ads will AND together all rule items in a rule item group. This means that every rule item in at least one rule item group must match in order for the rule to add a visitor to the list. This is called "disjunctive normal form", or OR_OF_ANDS.

The User Activity API allows a Google Analytics property owner to retrieve all analytics measurement data associated with a single user. Specifically, the API retrieves all of the measurement data associated with a particular User ID or Client ID.

A job containing offline user data of store visitors, or user list members that will be processed asynchronously. The uploaded data isn't readable and the processing results of the job can only be read using GoogleAdsService.Search/SearchStream.

Although goals are organized by category and origin, you can set the primary_for_goal attribute of each ConversionAction to indicate the role it should play in bidding and how the action's conversions will appear in reports.

You can use the Google Ads API to upload offline click conversions into Google Ads, mapping to the Uploads conversion source in the Google Ads UI, followed by Conversions from clicks. It gives you more flexibility in associating clicks with conversions. You can track ads that led to sales in the offline world, such as over the phone or through a sales rep.

Tracking phone calls from call extensions requires a ConversionAction with a type of AD_CALL. These use a Google forwarding number and specify the conversion action in the phone call extension's FeedItem. In the Google Ads UI, this type of conversion is called Calls from ads.