Last-click attribution assigns 100% of the credit for a conversion to the final marketing touchpoint before purchase.
Why Last-Click Attribution matters?
It’s the simplest and most widely used attribution model because it’s easy to track and understand. However, in ecommerce, it can skew budget decisions by overvaluing bottom-funnel channels (like branded search or retargeting) while undervaluing awareness and consideration-stage marketing.
How Last-Click Attribution works?
Analytics tools record all interactions in a user’s journey. In last-click attribution, only the final interaction before purchase receives credit. This makes it easy to measure direct conversion drivers but ignores earlier influences.
Example in ecommerce
A footwear brand sees that Google Shopping ads have the highest last-click ROI. However, they later discover that many of these conversions were initiated by a Facebook ad, which gets no credit in last-click reports.
Common mix-ups
Last-click attribution is not inherently “wrong”, it’s just limited. It’s best used when most purchases happen quickly after discovery.
Best practices
- Use last-click for short, direct purchase cycles.
- Pair with other models for full-funnel insight.
- Avoid using last-click alone for budget allocation in long sales cycles.
- Revisit the model as your marketing mix expands.
- Track assist metrics to see what’s being undervalued.
Industry benchmarks
- Still the default in many ad platforms, but losing favor as ecommerce journeys get longer and more complex.
