Practical guides on web speed and Core Web Vitals.
Guides on web speed, Core Web Vitals and the bottlenecks that make a site slow, with every threshold linked to its source.
Latest guides.
SEOCore Web Vitals: What They Measure and How Google Scores Them
What LCP, INP and CLS measure, the good and poor thresholds for each, why the score comes from the 75th percentile of real visits, and how to read the Search Console report.
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PerformanceHow Fast Should a Website Load?
Google's thresholds for LCP, INP, CLS, FCP and TTFB, what the most quoted speed studies actually measured, and the order to work through a slow page.
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SEOHow to Improve Core Web Vitals: 7 Steps for LCP, INP and CLS
A step-by-step fix guide for failing Core Web Vitals: find the failing metric in field data, then fix LCP, INP and CLS with code you can copy, and monitor the result.
/readHow we write these guides
Every speed threshold in these guides links to where it comes from, usually web.dev or Google's own Search documentation, so you can check the number before you act on it. The code samples are meant to be copied and run as written.
If you would rather hand the problem over, our speed optimization work starts with an audit of your real user data, and technical SEO services cover crawlability, indexing, redirects and structured data. For an app that is broken rather than slow, see software project rescue.
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