Core Web Vitals in plain English: the three numbers that matter
What LCP, INP and CLS actually measure, the thresholds Google uses, how the web is doing, and the fixes that move each number.
Topic
Core Web Vitals, images, caching and the habits that keep sites quick.
What LCP, INP and CLS actually measure, the thresholds Google uses, how the web is doing, and the fixes that move each number.
We encoded the same photo four ways and measured the results. AVIF came out 54% smaller than JPEG, and sizing it for its slot cut it by more than half again.
Most slow WordPress sites share the same handful of causes. Where the weight comes from, how to find the culprit, and what to change first.
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