Once you've added some email contacts to Delivery Hub, you can begin setting up custom audiences.
What are audiences?
An Audience is a list of contacts with shared characteristics (i.e. attributes) which you can use to better segment your email campaigns.
For example, if you are running a promotion on kids clothing, you will logically want to inform customers who you know are interested in these products. In Delivery Hub, you can set up an audience consisting of exactly these customers and send a segmented campaign. Here's how!