Twitter has announced general availability of Gnip's Audience API, following a public beta period launched last year at the Flight Developer Conference.

Brands and users of the Gnip Audience API can now define audiences in three new ways:

-Followers of any @handle can instantly create audience segments based on the followers of any public Twitter handle, without needing to download IDs from Twitter's public API;

-users can create audience segments made up of users that have seen a brand's owned, organic Tweets over the last 90 days, and then dive a layer deeper by constructing a segment made up of users that have engaged (clicked, liked, RT, etc.) with the brand's organic content over the same 90 day period;

-with first party data (via Tailored Audiences), create audience segments based on lists of email addresses, phone numbers, or mobile advertising IDs, or based on Twitter users who have visited a brand's website, that have been matched through Tailored Audiences. For the first time, brand customers can programmatically harness Twitter's demographic models to explore the characteristics of groups they know off-platform.

For more information, check out the Twitter Australia blog.