Attribution Window

An attribution window is the defined time period following an advertising exposure during which a subsequent consumer action — such as a purchase, website visit, or store visit — is credited to that advertisement. Attribution windows are a fundamental parameter in advertising measurement, determining which conversions are counted as outcomes of a specific campaign.

For example, a 7-day attribution window means that if a shopper sees an advertisement on Monday and makes a purchase by the following Sunday, that purchase is attributed to the advertisement. A 1-day window would only credit same-day purchases. The choice of attribution window significantly affects reported campaign performance — longer windows capture more conversions but may over-attribute to advertising (since some purchases would have occurred anyway).

In retail media, attribution windows are particularly important for closed-loop measurement. Retailers can match advertising exposure data (from proof-of-play and audience measurement systems) against transaction data within defined windows to calculate metrics like incremental sales lift and return on ad spend. The appropriate attribution window varies by product category — impulse purchases may use a 1-day window, while considered purchases (electronics, appliances) may use a 14 or 28-day window. The Adflux platform supports configurable attribution windows for retail media campaign measurement.