Audience targeting lets you show your ads to specific groups of people who are likely to be interested in your products or services. The first step in audience targeting is to create an audience.
From the top menu, select Tools > Audiences.
If you're using the new Microsoft Advertising navigation, from the navigation menu on the left, select Tools > Audiences.
An audience takes up to 24 hours to build, and targeting for it won't take effect until that point.