Page speed is how quickly a page loads and becomes usable for the person visiting it. People mean one of two things by it: the 0-100 score from Google’s PageSpeed Insights, or how fast the page actually feels on a real phone. The second is the one that counts. Someone with an urgent problem is not going to wait for a background video to load before looking for a way to reach you.
Briefly explained
- How fast a page loads and responds to taps.
- The PageSpeed Insights score is a lab test, not a ranking number.
- Google’s assessment uses data from real visitors.
- Speed helps, but relevant content still comes first.
How is it different from Core Web Vitals?
Page speed is the general idea. Core Web Vitals are the specific measurements Google uses.
The three metrics cover loading, responsiveness and visual stability, and they are measured from real visitors. What each one measures, and how the report works, is on the Core Web Vitals page. Page speed is the everyday word owners and developers use for the whole subject.
What does the PageSpeed Insights score tell you?
Less than it seems. It comes from one simulated test, and it varies between runs.
PageSpeed Insights shows two kinds of data for a page:
- Field data: What real Chrome users experienced over the past 28 days. The Core Web Vitals assessment at the top of the report is based on this.
- Lab data: A single simulated Lighthouse run on a test device. This is where the 0-100 score comes from, and it is the useful part for finding what is slow.
Read the field data to judge the page. Use the lab data to debug it. A score in the red next to a passing assessment is not an emergency.
Does page speed affect rankings?
Yes, through Core Web Vitals, but relevance still comes first.
Google says Core Web Vitals are used by its ranking systems, and that page experience is not one single signal. It also says good scores do not guarantee top rankings, and that a more relevant page can still win. A fast page with thin content can still lose to a slower one that answers the search. A slow page also loses visitors before it has loaded at all.
How do you improve it?
Mostly by removing weight, rarely by adding a plugin.
- Images: Compress the hero image and serve sizes that fit a phone screen.
- Scripts: Load chat widgets, review badges and tracking tags after the main content, and remove the ones nobody uses. A script that swaps in a call-tracking number is the exception: it has to load early.
- Fonts: Fewer font files, loaded so the text shows straight away.
- Hosting: A server that answers quickly. See hosting.
Start with the page your ads point at, then the main service pages. See landing page.
What do the terms mean?
- PageSpeed Insights: Google’s free tool that reports field and lab data for a single URL.
- Field data: Measurements from real Chrome users over 28 days.
- Lab data: A simulated test. Useful for debugging, not for judging.
- Lighthouse: The testing tool that runs the lab test and produces the score.
- Core Web Vitals: The three field metrics behind the Core Web Vitals assessment.
Owner questions
