First-party data is the new remarketing moat
Third-party cookie deprecation has reshaped what remarketing programs look like. In 2026, the programs that still perform are the ones built on first-party data: Customer Match lists seeded from CRM exports, CRM integrations that push purchase events back into ad platforms, and on-site pixels that capture behavioral signals through Google and Meta's own first-party channels. Remarketing that still relies on third-party cookies is collapsing in both reach and accuracy. The work has shifted from "retarget everyone who visited a page" to "build a permission-based audience asset the business actually owns." That shift is good news for disciplined advertisers and bad news for the "set it and forget it" retargeting of previous years.