What is Page Loading Speed?
Loading speed measures the time needed to fully display a web page. It's a Google ranking factor.
Key metrics
- ●TTFB (Time to First Byte): Server response time
- ●FCP (First Contentful Paint): First content display
- ●LCP (Largest Contentful Paint): Main element loading
- ●TTI (Time to Interactive): When the page becomes interactive
Factors that slow things down
- ●Unoptimized images (too heavy, wrong format)
- ●Blocking JavaScript and CSS
- ●Slow or distant server (no CDN)
- ●Too many HTTP requests
- ●No caching
How to improve?
- ●Compress and convert images to WebP
- ●Minify CSS and JavaScript
- ●Use lazy loading for images
- ●Implement a CDN
- ●Enable Gzip/Brotli compression
SEO Impact
Speed is a Google ranking factor. 53% of mobile users leave a page that takes more than 3 seconds to load.
Related Terms
What are Core Web Vitals?
Core Web Vitals are 3 Google metrics measuring the speed, responsiveness, and visual stability of a web page.
What is CLS (Cumulative Layout Shift)?
CLS measures a page's visual stability. A poor CLS means elements move around during loading.
What is LCP (Largest Contentful Paint)?
LCP measures the loading time of the largest visible element on a page. Target: under 2.5 seconds.
What is Lazy Loading?
Lazy loading is a technique that delays loading images and videos until they're visible on screen.
What is Google Lighthouse?
Lighthouse is a Google tool that audits a web page's performance, accessibility, SEO, and best practices.
What is TBT (Total Blocking Time)?
TBT measures the total time a page is blocked and unresponsive to user interactions.