What can be linked
A link is only accepted if the record exists and belongs to you, so a campaign cannot accumulate references that were never valid.
The rollup
The rollup resolves every linked record and aggregates what has actually been measured.Performance figures come from the
ContentPerformance rows the publishing integrations wrote. Content with no measurements contributes nothing and is counted separately — a campaign of ten pieces where two are published reports “2 of 10 measured”, not ten pieces averaging near zero.Records that no longer exist
Each link stores a label snapshot taken when it was made. If the record it points at is later deleted, the rollup reports it under dangling using that label, and states how many records the totals were computed from. This is deliberate. Silently skipping unresolved links would make a campaign’s measured performance fall when someone deletes a draft, and a vanished row would be indistinguishable from the campaign genuinely performing worse.Content Requests
The intake that usually starts a campaign’s work.
Experiments
Test a variant of a piece inside a campaign.