SEO glossary
PageSpeed
PageSpeed refers to how quickly a page loads and becomes usable for a visitor.
In plain English
Google's PageSpeed Insights blends lab data (Lighthouse) with real-user field data and scores 0–100. It's driven by image weight, JavaScript execution, server response time (TTFB), and render-blocking resources. The usual high-leverage fixes are compressing and lazy-loading images, deferring non-critical JavaScript, caching aggressively at the edge, and trimming third-party scripts that block the main thread.
Why it matters for SEO
Speed affects both rankings (via page experience) and conversion — every extra second measurably increases bounce, and mobile users on slower networks feel it most.
Check this on your own site with the free Page Speed Checker.
Related terms
Frequently asked questions
- What is PageSpeed?
- PageSpeed refers to how quickly a page loads and becomes usable for a visitor.
- Why does PageSpeed matter for SEO?
- Speed affects both rankings (via page experience) and conversion — every extra second measurably increases bounce, and mobile users on slower networks feel it most.
- How does PageSpeed work?
- Google's PageSpeed Insights blends lab data (Lighthouse) with real-user field data and scores 0–100. It's driven by image weight, JavaScript execution, server response time (TTFB), and render-blocking resources. The usual high-leverage fixes are compressing and lazy-loading images, deferring non-critical JavaScript, caching aggressively at the edge, and trimming third-party scripts that block the main thread.
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