Core Web Vitals not passing

Opportunity severity, in the performance tab

Why it matters

Field data from real Chrome users rates the page as needing improvement or slow. The assessment uses the 75th percentile of LCP, INP and CLS over 28 days.

How to fix it

Fix the metric that fails (see the LCP, CLS and INP findings) and re-check after 28 days of new field data.

How Crawlune finds it

Crawlune flags Core Web Vitals not passing automatically on every crawl and lists the affected URLs under the performance tab, where you can filter, inspect each page and export the list to CSV. The free version crawls up to 550 URLs with every check enabled.