CTR
A click is a relevance signal, not an end goal.
CTR Helps see if results invite follow-up action, but should be read along with conversion and reformulations.
Definition
Record which impressions and product clicks fall into numerator and denominator.
Position
Compare CTR by result position.
Query type
SKU-, Brand and wide category queries have different expectations.
Device
Mobile presentation affects click behavior.
Guardrail
Clicking more without better next steps can indicate deception or noise.