A type of segment in which all of the rules are evaluated within a single pixel call, instead of across pixel calls (i.e. occurring on multiple pageviews).
Composite segments are used to create audiences that have engaged with very specific content at a given point in time.
One one page view, a users reads about SUVs with Diesel engines. On a second page view, the users reads about convertibles with gas engines.
In a standard segment, the user would qualify the rule "SUV AND gas engine", because both attribute values are separately present in his profile.
In a composite segment, the users would not qualify the rule "SUV AND gas engine", because he did not see both attribute values on the same page view.