Guide · Every business
Why your website is slow on mobile data, and how to fix it
Your website might open instantly on the office Wi-Fi. Your customers are not on the office Wi-Fi. They are on a phone, on mobile data, standing outside your shop or sitting in an auto. If the page takes too long to show anything useful, they press back and tap the next result.
Here is how to see your site the way they do, and what usually slows it down.
How to test your website for free
- The real test: turn off Wi-Fi on your phone, open a private tab and load your website on mobile data. Count how long until you can see what you do and how to contact you.
- Google PageSpeed Insights: go to pagespeed.web.dev, paste your website address and look at the Mobile score. It simulates a mid-range phone on a slower connection and lists what is slowing the page down.
- Test more than the home page. Check the pages people actually land on from Google, such as a service page, your menu or your contact page.
PageSpeed scores move a little between runs, so do not chase every point. Look for big problems: a red score, or a first screen that takes several seconds to appear.
What usually makes business websites slow
1. Huge photos
This is the most common problem. A photo straight from a phone or camera can be several megabytes, uploaded and shown at the size of a postage stamp. Resize images to the size they are shown at and save them in a modern format such as WebP. The page looks the same and loads far faster.
2. Sliders and autoplay videos on the first screen
A slider with six large images makes the phone download all six before the visitor sees anything useful. One strong image, or a short, compressed video that only loads when needed, works better.
3. Too many plugins and add-ons
Website builders and WordPress themes often load chat widgets, pop-ups, animation libraries, several fonts and tracking scripts on every page. Each one is small. Together they keep the phone busy before it can show your page. Remove anything you do not actually use.
4. Slow or distant hosting
Very cheap hosting, or a server far away from your customers, adds a delay before the page even starts to load. A host with a content delivery network (a CDN) serves your pages from close to the visitor.
5. Content that jumps around
If buttons move while the page loads, people tap the wrong thing. Images and banners should have their space reserved, so the layout stays still.
The fixes that matter most
- Compress and resize every image, and use WebP where you can
- Put what matters on the first screen as text: who you are, what you do, and a call or WhatsApp button
- Remove sliders and unused plugins, pop-ups and widgets
- Load videos and maps only when someone scrolls to them
- Use hosting with a CDN and HTTPS
- Test again on mobile data after each change
Why it matters beyond speed
Google uses page experience, including how fast and stable a page is on phones, as one of many signals when ranking pages. More importantly, every extra second is a chance for a customer to give up. A fast site is not about a perfect score. It is about the customer getting their answer before they lose patience.
Want to know why yours is slow?
Send us your website. Within two working days you'll get a free short video of it loading on a phone, the way your customers see it, with the few fixes that would make the biggest difference. If it is already fast, we'll say so.