Changes made to audiences and audience rules are not reflected in audience membership until the audience is compiled.
When you compile an audience, the property values in user profiles and membership in distribution lists, security groups, and reporting structure are checked to see if they match the audience rules you have created. Users that match the audience rules for an audience are included in that audience and receive content targeted to that audience.
You can set a compilation schedule so that audiences are compiled automatically at regular intervals. You can also start a compilation at any other time if you must update an audience before the next scheduled compilation.
From the Manage Audiences page, you can start a compilation and set a compilation schedule. You can also view the compilation status and most recent compilation time, and see the number of uncompiled audiences.
All of the audiences are compiled automatically. The compilation status is displayed on the Manage Audiences page.