Reduce oversized images
A photograph that is thousands of pixels wide does not need to be delivered at full resolution to a small phone screen. Resize images for their intended use and choose modern, efficient formats where supported.
Give images explicit dimensions to reduce layout movement, and use descriptive alternative text when an image adds meaning.
Load less JavaScript
Every script can introduce download, parsing, and execution work. Remove libraries that are not essential, and delay noncritical scripts until the main content is usable.
Third-party advertising and tracking scripts deserve particular attention because they can change both speed and visual stability.
Keep navigation simple
A visitor should quickly understand where they are and how to find the next page. Clear headings, short labels, and generous spacing help people navigate and can make a website feel faster even before you optimize code.
Check the experience on a real mobile connection, not only on a powerful desktop computer.
Use caching thoughtfully
Static assets can often be cached so repeat visitors do not download the same files again. Choose sensible cache settings and use versioned filenames when updating important assets.
A content delivery network may reduce latency for a geographically distributed audience, but it does not replace good page design.
Measure before and after
Use browser performance tools to identify large files, rendering delays, and layout shifts. Make one change at a time and test again.
Aim for improvements that visitors notice: readable content sooner, stable pages, and responsive controls.