Page speed

Google grades pages on Core Web Vitals — three signals about how it feels to load and interact with a page. RankMeFast distinguishes field and lab measurements and shows only the evidence the configured provider actually returns:

Real-visitor data (field data)

Google’s Chrome UX Report aggregates real visits from Chrome users. When your site has enough traffic, this is the number that matters — it is what Google will judge you on. The three signals:

• LCP (Largest Contentful Paint) — how quickly the biggest visible element appears. Aim under 2.5 seconds.
• INP (Interaction to Next Paint) — how snappy your page feels when you click or tap. Aim under 200 ms.
• CLS (Cumulative Layout Shift) — how much things jump around during load. Aim under 0.1.

Field data appears only when Google CrUX is configured and has enough traffic for the URL or origin. The production DataForSEO Lighthouse provider is lab-only, so it leaves this row absent rather than estimating real visitors from a synthetic run.

Lab estimate (Lighthouse)

RankMeFast runs a synthetic Lighthouse test in a controlled environment; production uses DataForSEO Lighthouse Live for this lab signal. Treat it as a hint: a single Lighthouse run varies by ~10 points from one attempt to the next. Do not chase small changes — look at the trend across audits.

Mobile

Mobile is measured separately because phones render pages very differently. If your page is not mobile-friendly (missing viewport meta tag, tap targets too small), it lands in Fix now.

Tip: page-speed problems are usually image-shaped. Compress big images, serve modern formats (webp / avif), and lazy-load anything below the fold.

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