The short answerRun your address through Google's free PageSpeed Insights tool and look at the mobile result. Google counts a page as good when the main content appears within 2.5 seconds, the page responds to a tap within 200 milliseconds, and the layout barely shifts while loading. It matters because a customer on a phone will not wait long, and because Google uses page experience as one of many signals.
The two-minute test
Go to pagespeed.web.dev, paste in your home page address and wait. The tool is free and run by Google. It gives you two tabs, Mobile and Desktop. Look at Mobile first. Phones are slower than office computers, and mobile data is slower than Wi-Fi.
The score can move a few points between runs, so run it three times and look at the pattern. Then stand outside, turn off Wi-Fi on your phone, and open your own site as if you were a customer. Count how long it is before you can read the phone number and tap it.
What the three main numbers mean
Google calls its speed measures Core Web Vitals. There are three, and Google publishes the line between good and not good for each.
- Largest Contentful Paint: how long until the biggest thing on the screen, usually the main photo or headline, has appeared. Good is 2.5 seconds or less.
- Interaction to Next Paint: how long the page takes to react after a tap or a click. Good is 200 milliseconds or less.
- Cumulative Layout Shift: how much the page jumps around as it loads, the thing that makes you tap the wrong button. Good is a score of 0.1 or less.
Does speed affect where I show up in Google?
Google has said that page experience, which includes these measures, is one of the things its ranking systems look at, and also that relevant content matters more. The better reason to care is the customer. Somebody with a broken furnace who taps your result and gets a blank white screen has other results to try.
The usual causes of a slow small-business site
Most slow service-business sites are slow for the same handful of reasons.
- Photos uploaded straight from a camera or phone, far larger than the screen needs.
- A slider or video at the top of the home page.
- A page-builder theme that loads code for features the page does not use.
- Many plugins, each adding its own scripts.
- Third-party extras: chat widgets, review badges, maps, tracking tags and fonts loaded from other companies.
- Cheap shared hosting that is slow to send the first byte.
What to fix first
Start with images, because it is the cheapest win. Resize them to the size they are shown at and save them in a modern format. Replace the slider with one good photo. Then remove any plugin or widget nobody can name a reason for.
If the site is still slow after that, the cause is likely the theme or the host, and that is the point where a rebuild becomes cheaper than more patching. The sites I build at Novyx are measured with this same tool, which you can rerun yourself at any time.
Questions people ask
What is a good PageSpeed score?
Google labels 90 and above as good, 50 to 89 as needing improvement and below 50 as poor. The three Core Web Vitals are more useful than the single score, because they describe what a visitor actually feels.
Why is my mobile score much lower than desktop?
The mobile test simulates a slower phone on a slower connection. That is deliberate, and it is closer to what many of your customers have in their hand.
Will a faster site get me more calls?
Nobody can promise that. A faster site removes one reason for a visitor to leave before they see your number. Whether they call depends on everything else too.