R1 — Low CTR rule

What it detects

Pages with high impressions but click-through rate well below their cluster's average. These are "free clicks left on the table" — the page already ranks; fixing the title + meta can recover lost CTR without earning new rank.

Heuristic

• Page must have ≥ min_impressions_28d impressions over the last 28 days (default 500).
• Page CTR must be < ctr_multiplier_threshold × cluster_avg_ctr (default 0.7×).
• The cluster must have a meaningful baseline (≥ 5× page's min impressions).

Suggested action

Rewrite the title and meta description. Specifically: lead with the primary keyword, use a number or year if relevant, and write the meta as a benefit promise, not a description of contents.

Tuning

Project Detail → Rule tuning → low_ctr. You can adjust min_impressions_28d (raise it if you get too many low-volume opportunities), ctr_multiplier_threshold (lower = stricter), and max_per_run.