Testing, activation and “audience overlaps”
Why activation is gated, and what the exclusivity message means.
The test gate: a campaign can't activate until a test send succeeds — you experience exactly what your team will. Editing something send-critical (design, medium, message) asks you to re-test.
Exclusivity: one active campaign per member per occasion. If activation says the audience overlaps, another active campaign already covers some of those people for that occasion — the message names who and where. Narrow one audience, or pause the other campaign.