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Ad platforms change: APIs go down, integrations break, and platforms sometimes redefine what their data means. When that happens, it shows up in your numbers — this log records it.
Channel changelog introduced
This log starts now. Going forward, platform-side incidents, integration changes, and data-definition changes will be recorded here per channel, with dates — so when a number moves, you can check whether the channel itself changed first.
A number moved and there’s no entry here? Run Diagnose a ROAS drop — most differences are measurement, not outages.