Rung 5 — Clicks / CTR — real traffic delivered from search; follows position by months; zero-click/AI Overviews break the rank-to-click link (Ahrefs: AIO assoc. with 58% lower top-rank CTR)

Rung 5 — Clicks / CTR.

• What it measures: actual visits delivered from search, and the rate at which impressions convert to clicks.
• Where measured: Search Console (Performance report).
• How early it moves: follows position — months.
• Trustworthiness as progress signal: Higher — clicks are real traffic; CTR diagnoses title/snippet quality. But zero-click SERPs and AI Overviews now break the rank–click link (Ahrefs associates AI Overviews with a 58% lower average CTR for the top-ranking organic page).

Source: Google Search Console Help; Ahrefs research on AI Overviews and CTR.

Confidence: Verified (metric); Industry-consensus (zero-click effect).

Caveat: Ahrefs is a vendor selling SEO tooling; the 58% figure is a single-source observation, not an independently corroborated effect size. The directional finding (AIO suppresses CTR even at #1) is consistent with the broader 2025-2026 zero-click trend but the magnitude is vendor-flagged. CTR diagnoses title/snippet quality — use it as a fix-trigger on high-impression/low-CTR queries, not a success KPI.