Page speed

Audits and reports

Page speed

Core Web Vitals in plain words — real visitors vs a lab estimate.

Page speed

Google grades every page on Core Web Vitals — three signals about how it feels to load and interact with your page. There are two flavours of measurement and RankMeFast shows both:

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.

If your site is new or has low traffic, field data may not exist yet — the row shows "not enough visitor data yet". That is normal.

Lab estimate (Lighthouse)

When there is no field data, RankMeFast still runs a synthetic Lighthouse test in a controlled environment. Treat this 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.

Back to the docs index