Page Speed

Core Web Vitals — LCP, CLS, TBT, FCP via Google PageSpeed Insights API.

What We Check

Using Google PageSpeed Insights API, we measure Core Web Vitals: LCP, CLS, TBT. We get scores for performance, accessibility, best practices, and SEO.

Individual Checks

LCP

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Largest Contentful Paint — loading time of the largest visible element.

Example: Largest Contentful Paint
Best practice: ≤2.5s

CLS

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Cumulative Layout Shift — measures visual stability of the page.

Example: Cumulative Layout Shift
Best practice: ≤0.1

TBT

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Total Blocking Time — total main thread blocking time.

Example: Total Blocking Time
Best practice: ≤200ms

Performance Score

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Overall performance score from Google Lighthouse.

Example: Google Lighthouse
Best practice: ≥90

Why It Matters

Core Web Vitals have been an official ranking signal since 2021. Slow pages lose both users and positions.

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