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Cross-media reach and frequency measurement

Cross-media reach and frequency measures how many unique people a campaign actually reached across every platform combined, and how often, correcting for the same person being counted separately by each platform's own report. An advertiser's campaign typically spans several publishers and platforms at once, and each one only reports its own exposure in isolation, with no visibility into what a person saw elsewhere.

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How it works

Each media partner provisions its own exposure log into the data clean room. Matching then runs across all contributing parties simultaneously, rather than pair by pair.

In a Decentriq data clean room, this multi-party matching runs inside a confidential computing environment isolated even from Decentriq's own infrastructure, so no party sees another's raw exposure data at any point. The output includes a deduplicated reach figure and a frequency distribution showing how often the audience was reached, plus an overlap breakdown showing how much unique reach each channel contributed beyond the others. The analysis runs on a template, so marketing teams can run it without a dedicated data science team. Read the full breakdown of how cross-media reach and frequency works.

Frequently asked questions

Why can't I just compare each platform's own reach and frequency numbers?

Adding them together overstates true reach, since some people get exposed by more than one platform, and it hides where frequency is actually piling up on that overlapping audience.

What do media partners need to provide to be included?

Each partner provisions its own exposure log. There's no fixed minimum number of partners required, though very small channels may be too small to report on individually within the overlap breakdown.

What does the output actually include?

A deduplicated reach figure, a frequency distribution showing how often the audience was reached, and an overlap breakdown showing how much unique reach each channel contributed beyond the others.

View Other Measurement use-cases

Attribution

Connect campaign exposure to customer outcomes without exposing either party's raw data

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Conversion lift / incrementality testing

Measure the true incremental effect of a campaign against a control group

explore Conversion lift / incrementality testing ->

Incremental reach

Identify the audience a channel (e.g. CTV) uniquely reaches beyond another channel (e.g. Linear TV)

explore incremental reach ->

Script lift (pharma)

Pharma-specific version of conversion lift, built for US brands.

explore script lift ->

Audience quality

Pharma-specific version of reach quality, built for US brands.

explore audience quality (pharma) ->
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Talk to us about cross-media reach and frequency measurement

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