Many website owners test on fast office Wi-Fi and a flagship phone. Many customers browse on mid-range phones with variable 4G or 5G coverage. The experience can be very different.
Test in real conditions
- Use your phone on mobile data, away from Wi-Fi.
- Test on a budget Android phone.
- Use network throttling in browser developer tools.
- Check PageSpeed Insights’ mobile results and real-user data.
Biggest wins
- Smaller images: compress with our image compressor and use WebP via our format converter.
- Fewer scripts: chat widgets, trackers and sliders.
- Lighter fonts.
- Good hosting and a CDN.
- Lazy loading below the first screen.
Processing power
Heavy JavaScript takes longer to run on cheaper phones, even after downloading. Keep interactivity light.
Data costs
Lighter pages respect visitors’ data, especially in smaller towns.
Read how to make your website faster and Core Web Vitals.
Want the full picture? This article is part of Business websites: the complete guide, our in-depth guide with everything in one place.
