What is engagement segmentation testing?

Engagement segmentation testing isolates placement effects by engagement tier:

Divide your list into segments: highly engaged, moderately engaged, disengaged.

Send identical campaigns to each segment separately.

Measure placement and performance for each segment.

Reveals how engagement history affects inbox rates and whether disengaged segments are dragging down overall performance.

Often shows that engaged segments have significantly better placement than disengaged segments, even with identical content.

Test your trade routes to different merchant classes separately to understand which relationships are valuable.