If your website takes longer than three seconds to load, roughly half your visitors leave before they see a single word. No headline, no phone number, no contact form. They hit the back button and try the next result on Google.
And you’ll never know it happened. There’s no “sorry, your site was too slow” message in your inbox. Those people just vanish.
Speed is a business problem
Amazon found that every 100 milliseconds of extra load time cost them 1% of sales. You’re not Amazon, but the principle holds. Google’s own research shows that going from a one-second to a three-second load time increases bounce rates by 32%. Push that to five seconds and 90% of people leave.
Nine out of ten. And five seconds doesn’t even feel that slow when you’re the one waiting.
Google cares about speed too
Since 2021, Google has used Core Web Vitals as a ranking factor. In plain English: Google measures how fast your site loads, how quickly it becomes interactive, and how stable the layout is. Sites that score well get a nudge up. Sites that score poorly get pushed down.
It won’t override great content, but if two sites are equally relevant, the faster one wins. In competitive local searches, that edge can mean page one versus page three.
How to check yours
Go to PageSpeed Insights and type in your web address. You’ll get a score between 0 and 100. Green is good, amber needs work, red is a problem. Check the mobile score — that’s what Google primarily uses for ranking.
The key metrics to glance at:
- Performance score: Aim for 90+ desktop, 80+ mobile. Under 50 means serious problems.
- Largest Contentful Paint (LCP): How long until the main content appears. Under 2.5 seconds is good.
- Cumulative Layout Shift (CLS): Whether stuff jumps around while loading. You know when you’re about to tap a button and the page shifts? That.
- Total Blocking Time (TBT): How long the page is frozen while loading. Under 200 milliseconds is good.
For context, we built the Avanti Doors website to score 100/100 on PageSpeed. That’s what’s possible when speed is a priority from the start.
The usual culprits
Slow websites almost always suffer from the same problems.
Massive images. Someone uploads a 4MB photo straight from their phone. It displays at 600 pixels wide but the browser downloads the full 4000-pixel original. Multiply by five or six images per page and you’re asking visitors to download 20MB before they can read anything. The fix: resize, compress (TinyPNG or Squoosh are free), and use WebP format. This alone can cut page weight by 80%.
Cheap hosting. Shared hosting at a fiver a month means your site shares resources with hundreds of others. When one gets a traffic spike, yours slows down. Decent UK-based hosting costs fifteen to forty pounds a month and makes a real difference.
Too many plugins. Every WordPress plugin loads its own CSS and JavaScript, even on pages where it’s not needed. A site with thirty plugins active is loading an absurd amount of unnecessary code. Be ruthless — if you don’t use it, delete it.
Render-blocking scripts. Chat widgets, analytics trackers, social feeds, cookie banners — each adds a fraction of a second. Stack five together and your site takes three extra seconds to become usable. Only load what you genuinely need.
No caching. Without caching, every visitor downloads every file from scratch on every page. With it, their browser stores files locally so subsequent pages load almost instantly.
What “fast” actually means
Under two seconds is fast. Two to four is acceptable. Four to six is slow — you’re losing people. Over six is an emergency.
These times are for the full page to be usable, not just for something to appear on screen. A page that shows a blank white screen for three seconds then pops in all at once feels slower than one that loads content progressively.
Quick wins you can do today
- Compress your images with Squoosh or TinyPNG and re-upload them
- Delete any plugins you’re not actively using
- Install a caching plugin (WP Super Cache is free)
- Ask your hosting provider about a faster server option
- Remove third-party scripts you don’t need — the chat widget nobody uses, the social feed nobody looks at
If those fixes don’t get you there, the problem might be more fundamental. Sometimes the theme itself is bloated, and patching it costs more than starting fresh with a properly built website.
The bottom line
Website speed directly affects whether people stay, whether they get in touch, and whether Google shows you to anyone. A fast site won’t fix bad content, but a slow site will undermine even the best content.
Check your score. Fix the obvious stuff. And if you’re not sure where to start, that’s what we’re here for.
Frequently asked questions
How fast should my website load?
Aim for under three seconds on mobile as a minimum. Under two seconds is where you want to be. Google considers anything over four seconds to be slow and it will affect your rankings.
Does website speed really affect Google rankings?
Yes. Since 2021, Google has used Core Web Vitals — which include load speed — as a ranking factor. Between two similar sites, the faster one ranks higher. On mobile especially, speed has become increasingly important.
How do I check my website speed for free?
Go to pagespeed.web.dev and enter your address. Google analyses your site and gives you a score out of 100 for mobile and desktop, along with specific recommendations. Takes thirty seconds and costs nothing.