The most common causes of a slow website are large uncompressed images, heavy plugins and themes, weak hosting, and too many third-party scripts. Measure your site with Google's PageSpeed Insights, and start with images and hosting, since they usually make the biggest difference.
Step by step
- 1
Measure first
Run PageSpeed Insights on your most important pages on mobile, and record the score so you can compare after the improvements.
- 2
Images
WebP format, sizes suited to how they are displayed, and lazy loading for images further down the page.
- 3
Plugins and scripts
Remove what you do not need, and delay loading tracking and chat tools.
- 4
Hosting and caching
Hosting that matches your traffic, caching, and a content delivery network, or CDN.
- 5
Fonts and design
Fewer fonts and font weights, and avoid elements that shift the page while it loads.
Speed on mobile affects both your sales and how your site appears in search, so measure it on mobile, not on a desktop computer.
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