Definition
Deduplicated reach is the true number of unique people a campaign reached across all channels, after removing the audience overlap between them. If the same person is reached on TV, on YouTube and on Meta, deduplicated reach counts that person once — not three times. It is the honest answer to: how many real, distinct people did this campaign actually reach across every screen?
Why it matters
Platform-reported reach figures cannot be added together, because audiences overlap. Summing them inflates reach and hides how much budget is being spent re-reaching the same people. Deduplicated reach matters because it reveals genuine audience size, exposes wasted duplication, and lets teams compare channels fairly.
How it is measured
Deduplicated reach is calculated by measuring exposure across channels from a consistent single-source basis and then resolving which exposures belong to the same person. The overlap is removed so each unique individual is counted once.
How SYNC measures deduplicated reach
SYNC measures the same people across linear TV, OTT, YouTube, Meta and digital and removes overlap to report deduplicated reach. This shows advertisers the real unique audience reached, where duplication is occurring, and how much reach each channel genuinely contributes.
Frequently asked questions
Deduplicated reach is the number of unique people reached across all channels after removing overlap, so each person is counted once rather than once per platform.
Because adding up platform reach double-counts people reached on multiple channels. Deduplicated reach shows the real unique audience and reveals where budget is wasted re-reaching the same people.