How to optimise your site for mobile devices

Most people now access the internet from their phone rather than a desktop. If your website has not been built with that in mind, visitors on mobile are likely to encounter oversized images, broken elements and layouts that require excessive scrolling to use.

Mobile optimisation is not a one-time fix. It touches your design, your SEO strategy and how you think about your users. This post covers the key areas to address.

Why mobile traffic matters

The shift to mobile browsing has been building for years and shows no sign of reversing. During the third quarter of 2020, over 50% of worldwide internet usage came from smartphones. More than three billion people now own one. When someone wants to check a train time, look up a product or review their bank balance while out and about, their phone is the device they reach for.

For businesses, this has a direct impact on search visibility. Google now uses the mobile version of your site first when determining how to rank it. A site that performs poorly on mobile is likely to rank lower than a competitor whose mobile experience is solid, regardless of how good the desktop version looks.

There are other reasons to prioritise mobile beyond search rankings. A site that works well on a phone builds trust and keeps visitors engaged. One that does not tends to lose them quickly, often to a competitor whose site does work. Mobile users also account for roughly six in ten search queries, and many of those searches have local intent, making mobile performance particularly important if your business has a physical presence. Our post on local SEO ranking covers that angle in more detail.

Mobile SEO is not the same as desktop SEO

Optimising for mobile is not the same as optimising a desktop site and then checking it on a phone. Mobile users search differently. Voice search is far more common on mobile, which means longer, more conversational queries appear more often. The visible length of meta titles and descriptions is also shorter on a mobile screen, so copy that reads well on desktop may get cut off.

Because Google indexes the mobile version of your site first, any content or structured data that only appears on your desktop version may not be picked up. Your mobile site needs to carry the same content weight as your desktop version, not a stripped-back alternative.

Practical ways to improve your mobile site

The following approaches cover the main areas where mobile sites tend to fall short. Some are design decisions, others are technical, and a few come down to how you think about your audience.

Design for mobile first, not as an afterthought

The traditional approach was to design a desktop site and then adapt it for smaller screens. Given that mobile now accounts for the majority of traffic, it makes more sense to start with the mobile layout and scale up to desktop from there. Designing mobile-first forces you to prioritise what actually matters on the page, which tends to produce cleaner results on all screen sizes.

Know who your users are and what they need

A common mistake is trying to make a mobile site do everything for everyone. Mobile users tend to have a specific goal in mind. If you understand who your typical visitor is and what they are trying to accomplish, you can build a site that gets them there without unnecessary friction. A specialist experience almost always outperforms a general one.

Use responsive HTML so layouts adapt automatically

Responsive design means your site’s layout adjusts based on the screen size and orientation of the device being used. Rather than maintaining separate desktop and mobile versions, a responsive site reflows its content to fit whatever it is displayed on. This is the standard approach for modern websites and most themes and frameworks support it by default. You can also use HTML to control how specific elements, text sizes and images appear at different breakpoints.

Use fluid layouts rather than fixed pixel widths

There are too many different screen sizes in use to design for specific devices. A fluid layout uses percentages rather than fixed pixel measurements, so elements scale proportionally across different screen widths. This approach has become standard practice among experienced developers because it means your site adapts to screens you have never tested on, rather than breaking on anything outside a narrow range.

Design touch targets with fingers in mind

Most mobile users interact with their fingers, not a stylus. Buttons, links and form fields need to be large enough to tap accurately without zooming in. If a user has to pinch and zoom to select the right element, or repeatedly misses a small link, they are likely to give up. Touch-friendly design means generous tap targets, adequate spacing between interactive elements and avoiding hover-dependent interactions that do not translate to touchscreens.

Put the functions your users actually need front and centre

Functionality on a mobile site should reflect what your visitors are there to do. If you run an e-commerce site, that might mean a prominent search bar, clear product filters and a checkout that works without a keyboard. If you have physical locations, a store finder matters more than a long homepage introduction. Identify the two or three things most visitors need to do and make those as accessible as possible.

Compress images to reduce load times

Images are often the biggest contributor to slow mobile load times. Large, uncompressed files take longer to download on mobile connections and consume more bandwidth. Compressing your images before uploading them reduces file size without a visible drop in quality for most use cases. Our guide to optimising images for the web covers the formats and tools worth using. If you are running WordPress, there are also plugins that handle compression automatically on upload.

Consider Google AMP for content-heavy pages

Google Accelerated Mobile Pages (AMP) is an HTML framework designed to make web pages load faster on mobile devices. Pages built with AMP are stripped back to prioritise speed, which can improve both load times and visibility in mobile search results. AMP is not the right fit for every type of page, but for articles, blog posts and news content it can make a noticeable difference. It is worth evaluating whether your content type would benefit before committing to the implementation.

If you are building or rebuilding a site and want a hosting environment that supports fast, well-structured WordPress sites, take a look at our WordPress hosting plans. For broader site performance questions, our post on Core Web Vitals is a useful next step.

If you have questions about your current setup or want to talk through what changes might make the most difference for your site, get in touch with the team.