Proving channel synergy between Google, Meta, and LinkedIn

Ask a specialist whether their channels reinforce each other, and the answer is almost always a feeling, not a number. Google Ads reports on Google Ads, Meta reports on Meta, and neither knows the other exists. Proving channel synergy does not mean "one more report"; it means a layer that looks at the same question across channels.

That question breaks down into three roles every campaign, on every channel, effectively plays: prospecting (tapping new demand), retargeting (recapturing a warm audience), and branded capture (catching demand that already existed, on your own brand name). You can classify a campaign into one of the three from its own signals: running on your own brand terms makes it branded capture. Targeting a custom audience, site visitors, or a customer list makes it retargeting. A broad or lookalike audience, or a demand-generating campaign type (display, video, demand gen), makes it prospecting.

Once every campaign on every channel has a role, two things become visible that no single-channel report shows. The first is the double-pay risk: two or three channels all retargeting the same warm pool, driving up blended CPA without any single report flagging anything odd, because within each channel on its own the retargeting campaign looks like it is performing fine. The second is the growth ceiling: a portfolio made up mostly of retargeting and branded capture, with no campaign tapping new demand, stops growing once the existing pool is sold through, and that pattern only becomes visible once you lay every channel side by side.

What this delivers in practice depends on how much audience data is available: on Google Ads the role classification is complete today, since brand terms and campaign type are simply in the data every account already has. On Meta and LinkedIn that same classification is only as good as the audience data underneath it, and grows as that gets read more deeply. An unrecognized campaign deliberately comes back as "unknown" instead of being guessed: in channel synergy, a wrong guess is more expensive than an honest "we don't know yet".