What is Last-Click Attribution?
An attribution model that gives 100% of conversion credit to the final touchpoint before conversion.
The detailed definition
Last-click is the default in most ad platforms and the easiest model to implement. Honest for short, direct-response journeys (a Meta retargeting ad → same-day purchase). Dishonest for considered purchases where the last click is usually branded search the buyer would have converted on anyway. The biggest critique: last-click systematically under-credits demand-generation channels (display, social, podcasts, content) and over-credits demand-capture (branded search, retargeting). Teams that optimize purely for last-click ROAS often cut the awareness channels feeding their pipeline. The pragmatic recommendation: use last-click for daily campaign tactical decisions (it matches platform reporting and is operationally simple) and multi-touch attribution for monthly strategic decisions.
Frequently asked about Last-Click Attribution
›Is last-click attribution still useful in 2026?
Yes, for daily campaign-level decisions. It matches how ad platforms report by default and is operationally simple. The error in last-click is using it for strategic decisions (channel-level budget allocation, demand-gen evaluation) where it systematically misleads.
›Why does last-click favor branded search?
Branded search is usually the final touchpoint of a journey that started elsewhere — the buyer saw your TikTok ad, considered it for two weeks, then Googled your brand to convert. Last-click credits the Google branded search ad with 100% of the value, ignoring TikTok. This is structurally why teams that optimize for last-click ROAS slowly cut their demand-gen pipeline.
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