You’ve probably heard the phrase “Core Web Vitals” from someone trying to sell you an SEO package. It sounds technical, and it gets explained with numbers and letter grades that don’t mean much on their own. So let’s skip the jargon and talk about what it actually costs you when your site is slow.

What a “speed score” is actually measuring

Google runs a free tool called PageSpeed Insights that scores any web page out of 100. Underneath that single number are three things it’s really checking:

  • How fast the main content shows up. Not the page starting to load — the moment someone can actually see what you’re offering. If that takes four or five seconds on a phone, most people have already made a decision about you before your site finishes loading.
  • Whether things jump around while the page loads. You’ve felt this — you go to tap a button and an image loads in above it, so you end up clicking an ad instead. That’s a real, measurable annoyance, and Google measures it too.
  • How quickly the page responds once someone actually tries to do something — tap a menu, fill in a field, hit “call now.” A page that looks done but is still busy loading scripts in the background will feel broken, even though technically it isn’t.

None of this is abstract. It’s the difference between a visitor thinking “this business has their act together” and a visitor closing the tab and calling the next name on the list.

Why it costs you money, not just a bad grade

Two separate things happen when a site is slow, and both of them lose you customers.

The first is the obvious one: people leave. Not because they’re impatient in some unreasonable way — because they came to your site to solve a problem (find your phone number, check your prices, see if you do what they need), and a slow site makes that harder than it should be. Most people don’t wait around and watch a spinner. They go back to the search results and try the next business instead. You never find out they were there.

The second is less obvious, and arguably worse: Google uses page speed as a ranking factor. A slow site doesn’t just lose visitors who arrive — it shows up lower in search results in the first place, so fewer people ever arrive at all. You’re not just leaking customers at the door. You’re getting fewer people to the door to begin with.

Put those together and a slow website is quietly taxing you twice — once on visibility, once on conversion — and neither shows up as a line item anywhere. It just looks like “business is a bit slow this month.”

What’s usually actually causing it

For most small business sites, it’s not one dramatic problem. It’s a few ordinary ones stacked on top of each other:

  • Images that are much bigger than they need to be — a photo straight off a phone camera, dropped into a page at a fraction of its size, but still downloading at full size.
  • A page built on a drag-and-drop website builder that ships a large JavaScript framework to render a page that’s mostly just text and a couple of images.
  • Third-party scripts — chat widgets, tracking pixels, font services, review plugins — each one adding its own delay, often for a feature nobody’s actually using.
  • Fonts loaded from somewhere else on the internet, adding an extra stop before the browser can even start rendering text.

Individually, none of these feel like a big deal. Added together, they’re usually the entire difference between a site that feels instant and one that feels like it’s thinking about it.

How to check where you actually stand

Search “PageSpeed Insights,” paste in your website’s address, and look at the mobile score specifically — most of your visitors are on their phones, and mobile is almost always worse than desktop. Anything in the 90s is genuinely fast. Anything under 50 is very likely losing you visitors before they even see what you do.

If your score is bad, that’s not a verdict on your business — it’s usually just years of small additions (a widget here, a plugin there) that nobody ever went back and cleaned up. It’s fixable, and it’s usually not an expensive fix relative to what it’s costing you every month in visitors who leave without you knowing they were ever there.

The honest caveat

Fixing your site’s speed won’t automatically fill your inventory or book out your calendar. It’s not a magic lever. What it does is remove one specific, needless reason people leave before you ever get the chance to make your case — and stop Google quietly ranking you below competitors who fixed this two years ago.

If you want a second opinion on where your own site actually stands, that’s exactly what a technical audit is for — see website design & development for what that looks like, or just send a message with your site’s address and I’ll tell you honestly what I see.