Mobile SEO essentials for UK websites

Why mobile comes first

Google uses mobile-first indexing, which means it mostly uses the mobile version of a page's content for indexing and ranking. Its mobile-first indexing best practices explain what that means for site owners.

For most UK small businesses, it also matches reality. People look up a plumber when water's coming through the ceiling, check a restaurant's menu on the way there, or find a dentist's phone number on the bus. If the mobile site is awkward, they go back and choose someone else.

Same content on mobile and desktop

The most important rule: your mobile pages should contain the same essential content as the desktop version. Problems arise when:

• A mobile theme hides sections to keep things short.
• Tabs or accordions don't load their content until tapped, in a way Google can't see.
• Images, headings or structured data appear only on desktop.

Content inside accordions is fine as long as it's in the page code when it loads. Content that's fetched only after someone taps may not be seen.

Test on a real phone

Emulators and tools help, but nothing beats using your own site on an ordinary phone over mobile data. Try this:

1. Open a private window so nothing's cached. 2. Turn off Wi-Fi. 3. Search Google for your main service and town, and tap through to your site. 4. Try to find your prices, your phone number and how to book. 5. Fill in the enquiry form.

Note anything slow, fiddly or hidden. Then ask someone who doesn't know your site to try the same thing while you watch. You'll learn more in five minutes than from any report.

What good mobile pages have

Readable text

Body text should be readable without zooming. Lines shouldn't run off the screen. Contrast should be strong enough to read outdoors.

Tap targets that work

Buttons and links need enough space that people don't hit the wrong one. Phone numbers should be tappable links that start a call.

Fast loading

Mobile connections vary. Compress images, limit scripts and check PageSpeed Insights on your key pages. Our Core Web Vitals guide explains the measurements.

No intrusive pop-ups

Pop-ups that cover the main content as soon as someone arrives from search are annoying and can make a page harder to use. Google's page experience guidance mentions intrusive interstitials. Cookie banners and legally required notices are expected, but keep them compact.

Forms built for thumbs

Use the right input types so phones show a number pad for phone numbers and an email keyboard for email addresses. Keep fields to the minimum. Let browsers autofill.

Local mobile behaviour

Mobile searchers are often close by and ready to act. Help them:

• Put the phone number and opening hours near the top of key pages.
• Link your address to a map.
• Mention parking, nearest station or bus stop if people visit.
• Keep your Business Profile accurate, since many mobile searchers act straight from the map without visiting your site.

A worked example

A dental practice in Leicester had a website that looked fine on desktop. On phones, the menu covered the screen with a slow animation, the booking button sat below a large image slider, and the phone number was an image rather than text, so it couldn't be tapped.

The practice replaced the slider with a single image, put a "Call" and "Book online" bar at the top of every page on mobile and turned the phone number into a proper link. It also moved its fees table from a PDF into an ordinary page, so it could be read on a phone without downloading. None of this needed a redesign.

Separate mobile sites

Some older sites use a separate mobile address such as m.example.co.uk. This is harder to maintain and easy to get wrong. If you're rebuilding, use a responsive design that adapts one set of pages to any screen. If you're stuck with a separate mobile site for now, follow Google's guidance on making sure both versions have the same content and the right annotations.

A monthly mobile check

• Load your top five pages on a phone over mobile data.
• Tap the phone number and check it dials.
• Submit a test enquiry from your phone.
• Check Search Console's Core Web Vitals report for mobile.
• Look at your analytics for pages with unusually high exits on mobile compared with desktop.

Questions