Invest, Measure, Allocate Your Media Budget in the Omnichannel Era

How is Meta CAPI for offline changing the game?

Omnichannel measurement: finally see the true performance of your media campaigns

A store purchase after a Meta ad. A signed appointment after a social campaign. A closed contract after a display retargeting: these conversions are real, they have value, but they never show up in your dashboards. For the majority of B2C advertisers, between 30% and 70% of the true value generated by their campaigns remains invisible. This is not a creative problem, nor a targeting problem: it is a signal problem. And it is an expensive one, in misallocated budgets, undervalued channels, and underfed algorithms.

This white paper is written for marketing leaders managing mixed-channel customer journeys: retail, automotive, banking, insurance, customer service, contact centres, who can no longer afford to measure performance with half the picture missing. Across 22 pages, you will find a clear mapping of omnichannel investment challenges, a practical breakdown of the attribution methods that hold up in 2026 (MMM, MTA, incrementality), and a concrete overview of offline Conversion APIs from Meta, Google and TikTok, with implementation best practices to finally reconcile what your customers do online with what they buy everywhere else.

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