Glossary

Page Speed

How fast the content of a web page loads for a visitor.

Definition

Page speed refers to how quickly a web page's content loads and becomes usable for a visitor. It is measured by multiple metrics including Time to First Byte (TTFB), First Contentful Paint (FCP), Largest Contentful Paint (LCP), and Time to Interactive (TTI). Page speed is influenced by server response time, image optimization, code minification, browser caching, and use of CDNs.

Why It Matters

Page speed is a confirmed Google ranking factor and a critical component of Core Web Vitals. Slow pages rank lower and have dramatically higher bounce rates. Fast-loading pages improve user experience, reduce bounce rate, increase dwell time, and earn better rankings — making page speed one of the highest-ROI technical SEO investments.

Examples

LCP targetLargest Contentful Paint under 2.5 seconds is considered 'Good' by Google's Core Web Vitals standards

Speed impactCompressing images from 2MB to 200KB can reduce page load time by 1–3 seconds

Common Mistakes

Not compressing images — the most common cause of slow page load times.

Not enabling browser caching.

Loading too many external scripts and tracking pixels.

Ignoring mobile page speed.

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Related Terms

Technical SEO

The optimization of a website's technical infrastructure to improve crawlability and indexing.

Bounce Rate

The percentage of visitors who leave a site after viewing only one page.

Dwell Time

The amount of time a user spends on a page before returning to search results.

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