Matched Reach
Matched reach stats provide information on the number of records and devices that have been matched at a distribution destination for your distributed fields and segments. These stats typically take 4-7 days to populate after the field or segment has been added to distribution.
Matched reach stats allow you to gauge the effectiveness of your ad campaigns by confirming how many users included in your campaign files could be targeted successfully at an advertising platform via specific device types.
For more information on these stats and where they're displayed, see "View Matched Reach Stats".