Audience Segment (also known as: User Segment, Segment) is a list of user profiles consisting of individual internet users grouped together based on shared similarities, such as the websites they visit, the actions they take (e.g., making a purchase or completing a form), or personally identifiable data such as gender or geographical region.
For example: “Android users between the ages of 20 and 35 who live in New York.”These segments are used during Real-Time Bidding (RTB) media buys to display ads to users who meet the specified criteria.