You ran your site through PageSpeed Insights, saw a red number (or a suspiciously perfect green one), and felt either doomed or done. Neither reaction is quite right.

That score is useful. It is also a gym report card, not a full physical. Google currently treats Core Web Vitals—Largest Contentful Paint, Interaction to Next Paint, and Cumulative Layout Shift—as the main field metrics for loading, responsiveness, and visual stability. They matter for how your site feels. They are not an instant-ranking magic wand, and a single Lighthouse run is not the whole verdict.

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