Acoustic Exchange endpoints that provide audience data are referred to as audience sources.
When you register an audience source endpoint on behalf of an Acoustic Exchange user account, you must indicate that the endpoint provides audience data. You also specify at least one unique identifier that can be used to identify individual members of the audience. You can also specify other descriptive attributes that the audience contains.
After you complete endpoint registration, the endpoint appears in the Acoustic Exchange interface and is identified as an audience source. The identifiers and attributes are also available in the Acoustic Exchange interface. When users share audiences, they can use the Acoustic Exchange interface to map identifiers and attributes in the source audience to corresponding attributes in the destination audience.