Cohort Sync

Cohort sync is automatically sending the list of users in a behavioral cohort to an external destination — an ad platform or an email tool — so that same group can be targeted by a campaign.

Cohort sync is a bridge between analysis and action: a cohort you built in the analytics tool — say “users who abandoned the cart” — instead of staying a number in a report, becomes the audience of a marketing campaign. It is effectively a targeted form of reverse ETL. But it has two serious obstacles. First, privacy: sending user identity (even a hashed email) to a third-party platform is a data sharing that requires a legal basis and consent. Second, ecosystem dependence: this sync usually only makes sense with global ad platforms, and for a business not tied to that ecosystem, or one keeping its data inside the border, its usefulness is limited.