A tenth of a second doesn't sound like much. On a mobile site, it's enough to change whether someone buys, books, or bothers getting in touch at all.

That's not a guess. Google commissioned a study with Deloitte and 55, tracking 30 million user sessions across 37 major retail, travel, luxury and lead generation sites over a month. The finding: improving mobile site speed by just 0.1 seconds increased conversion rates by 8.4% for retail sites and 10.1% for travel sites, and retail visitors spent 9.2% more once they converted. Nobody redesigned anything during the study. The sites just got a fraction of a second faster, and people bought more.

Why Does a Fraction of a Second Make That Much Difference?

Because visitors don't consciously notice a slow site, they just leave it. Nobody thinks "this page took 3.4 seconds instead of 3.1, I'm going elsewhere." They just get a vague sense of friction and tap back to the search results. The frustration is real even when the cause is invisible.

This matters more on mobile than desktop, since mobile connections are more variable and patience is shorter to begin with. For a Sheffield business whose customers are increasingly finding them through a phone rather than a desktop search, this isn't a minor technical detail. It's sitting directly between a visitor and an enquiry.

What Actually Slows a Website Down?

A few common culprits show up again and again on small business sites.

Individually, none of these feel like a big deal. Stacked together on a site that's been added to piecemeal over a few years, they add up to exactly the kind of delay the Deloitte study measured.

Does Speed Affect Google Rankings Too?

Yes, alongside the direct effect on conversions, page speed is one of the signals Google factors into how a site ranks. A fast site isn't just easier to buy from, it's also easier to find in the first place. The two effects compound each other: a slow site both loses the visitors it already has and struggles to attract new ones through search.

We've seen this play out directly with local businesses losing customers to competitors online, and speed is frequently part of that story, not the whole of it, but a genuine piece.

What Should You Actually Do About It?

Start by checking where your site actually stands rather than guessing. Google's own PageSpeed Insights tool gives a free, specific breakdown of what's slowing a page down. From there, the usual fixes are compressing images properly, removing unused plugins, and making sure hosting is actually suited to the site running on it.

It's also worth thinking about speed alongside the rest of your local search presence rather than in isolation. We've covered the broader picture in what local SEO actually is and why it matters, since a fast site is one part of a much bigger picture, not a fix on its own.

If you're not sure whether speed is actually costing your business anything, get in touch with our team. We'll take an honest look and tell you plainly what we find.

Frequently Asked Questions

How much does website speed actually affect conversions?
In Google's study with Deloitte and 55, a 0.1-second improvement in mobile speed lifted conversion rates by 8.4% for retail sites and 10.1% for travel sites, based on 30 million real user sessions. Small speed gains translate directly into more bookings and sales, not just a better-feeling site.

What's a good page load time to aim for?
Google's own guidance is to get the Largest Contentful Paint, roughly when the main content becomes visible, under 2.5 seconds on mobile. Most small business sites can get close to that just by fixing images, hosting and unused plugins, without a full rebuild.

How can I check my website's speed for free?
Google's PageSpeed Insights tool tests any URL for free and gives a specific, prioritised list of what's slowing it down, rather than just a generic score. It's the same starting point we use before recommending any fix.