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Analytics & Measurement

Explain a drop in conversion after a traffic surge

Separate a traffic-mix shift from a broken funnel.

Break the change into groups

A campaign sends 1,000 visits at 4% conversion. Adding 1,000 research visits at 1% raises orders from 40 to 50 while lowering overall conversion to 2.5%. The original traffic did not get worse in this example.

Break the change into groups. Check rates within stable segments. Decide whether the new volume was useful.
Key decisions covered in this article.

Check rates within stable segments

Compare device, source, and landing intent before and after the surge. A broad fall within each segment points to a different problem from a shift toward lower-intent traffic.

Decide whether the new volume was useful

Compare incremental contribution and acquisition cost for the new visitors. Check whether they help at a later stage before deciding from the blended rate alone.

Try a related tool

Find the share of eligible visits that completed a defined action. Count at most one conversion per visit for this calculation.

Open Conversion Rate