If a figure in an answer is computed on an event, a property or an entity that had a warning in that period, and that warning changes the number, the answer says so. A revenue total built on a purchase event that lost its value for two days is not presented as a clean total.
Update, September 20: that clarification is now shown as a separate Data quality note, apart from the rest of the answer, so it reads as what it is: the monitoring telling you how far to trust the figure.
Who it is for: anyone who sends a number upstairs. The agent answers from your real traffic and from the warnings on it; the note is where the two meet.
Where: every answer that touches a monitored event or property.