Mobile-first Indexing Gaps
Google’s mobile-first indexing means the mobile rendering of your pages is what Google crawls, evaluates and ranks. This report surfaces pages where that assumption breaks down: pages with explicit mobile usability errors, pages that are earning real clicks but are still being crawled as Desktop, and pages where the crawling agent is unknown. Left unresolved, these pages risk a ranking penalty or exclusion from the mobile-first index.
The four risk tiers
Google’s URL Inspection API returned a non-passing mobile usability verdict (e.g. viewport not configured, content wider than screen, tap targets too close, text too small). Fix viewport, font-size and touch-target issues first — these are explicit quality signals.
Googlebot last crawled this page as a Desktop agent even though it earns ≥5 clicks in the last 28 days. Under mobile-first indexing Google ranks on the mobile rendering — if it hasn’t crawled the mobile version, rankings may be based on stale or incomplete data.
The URL Inspection record has no crawling agent stored but the page earns real clicks. Re-run URL Inspection to confirm mobile-first status before assuming it is healthy.
Still crawled as Desktop but earning fewer than 5 clicks. Lower priority, but signals an incomplete mobile-first migration. Monitor rather than fix urgently.
How we compute it
- We pull the latest URL Inspection records for your site from the Search Console API,
reading the
crawledAsfield and themobileUsabilityResult.verdict. - We join those records to the 28-day GSC clicks and impressions for each URL.
- Each URL is assigned a tier using the logic above. Pages where Googlebot crawled as Smartphone and there are no mobile usability errors are excluded (healthy).
- Results are sorted by tier priority (Mobile errors first) then by clicks descending within each tier.
Summary tiles
- Mobile errors — count of pages with an explicit mobile usability verdict failure.
- Desktop-crawled with traffic — count of pages earning ≥5 clicks but last crawled as Desktop.
- Clicks at risk — sum of 28-day clicks on all Mobile-error and Desktop-crawled-with-traffic pages. The economic exposure of the top two tiers.
- Pages flagged — total pages across all four tiers.
Table columns
- URL — links to the live page.
- Risk tier — colour-coded badge.
- Crawled as — the agent Googlebot last used: Smartphone, Desktop or unknown.
- Mobile verdict — the URL Inspection mobile usability verdict: PASS, FAIL or blank.
- Clicks / Impressions — 28-day GSC totals.
- Recommended fix — a one-line action per tier.
What to do with it
- Fix Mobile errors first: open each URL in Google’s Mobile-Friendly Test to get the specific issues, then fix at the template level so all similar pages are corrected in one go.
- For Desktop-crawled with traffic: request a re-crawl via URL Inspection and verify the responsive rendering is correct. Check that there is no Vary header or user-agent-based redirect blocking Smartphone Googlebot.
- For Crawler unknown with traffic: submit via URL Inspection and re-check in 2–3 weeks.
- After fixes, re-run URL Inspection to confirm the verdict changes to PASS and crawledAs changes to Smartphone.
Related reports
- Index Coverage — full URL Inspection verdicts including canonical and structured-data issues.
- PageSpeed Overview — mobile vs desktop performance scores for tracked URLs.
- Mobile Performance Drag — URLs where mobile PSI score is far worse than desktop.
- Crawl Efficiency — Googlebot crawl-date analysis across all pages.