A segment is a group of users created by applying rules to the user base. Since any person can belong to multiple segments, reporting on sales by segment can result in the appearance of inflated revenue; segment clusters provide a more precise view of how people group themselves.
The Segment Cluster query subject lists the segments.
Segment Cluster Size refers to the number of segments in the cluster.
The Segment regular dimension includes two hierarchies, one of which includes the segment cluster data, the other only the Segment and Segment (All).
