Page speed is not one number. It covers how soon content appears, how soon the page responds to clicks and whether the layout jumps while loading. Google summarises the experience in Core Web Vitals. Fast pages keep visitors, and speed is one of many signals Google uses, so it rarely beats relevance and quality but it can decide between similar pages.
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What usually slows pages down
- Large uncompressed images
- Too much JavaScript, especially third-party scripts and widgets
- Slow server responses
- Fonts and styles that block rendering
How to measure
Use real-user data from Search Console's Core Web Vitals report and PageSpeed Insights, and use lab tools to find causes. Fix the slowest templates first rather than individual pages, since a single template change helps hundreds of pages.
Common mistakes
Chasing a perfect score
A tool score is a guide. Improve real visitors' experience and stop when the pages feel quick.
Frequently Asked Questions
Usually resizing and compressing the largest images, then removing scripts you no longer need.
Keep reading
- Core Web Vitals: Core Web Vitals are Google's three user-experience metrics: loading (LCP), responsiveness (INP) and visual stability (CLS).
- TTFB (Time to First Byte): Time to First Byte is how long a browser waits between asking for a page and receiving the first byte of the response.
- CDN (Content Delivery Network): A CDN is a network of servers around the world that stores copies of your site so each visitor gets it from a nearby location.
- PageSpeed Insights: PageSpeed Insights is Google's free tool showing a page's real-user Core Web Vitals from CrUX alongside a Lighthouse lab audit with fixes to try.
- Bing Webmaster Tools: Bing Webmaster Tools is Microsoft's free console for site owners. It shows how Bing crawls and indexes a site and offers SEO reports and URL submission.
- Content delivery network: A CDN is a network of servers worldwide that caches and serves a site's files close to each visitor, cutting load times and shielding the origin server.
- Crawl Errors: Crawl errors are failures that happen when a search engine tries to fetch a URL, such as server errors, redirect problems, blocked pages or DNS failures.
- Crawlability: Crawlability is how easily search engine and AI crawlers can discover and fetch the pages on a site.
