You've probably heard that Google cares about "website performance" — but you may not know exactly what that means or why it affects your ability to be found online.
Core Web Vitals are a set of specific measurements Google uses to assess how good the experience of using your website actually is. They've been a ranking factor since 2021, and they matter more with every update.
Here's what they are, in plain English.
The Three Core Web Vitals
LCP — Largest Contentful Paint
This measures how long it takes for the main content on your page to appear. Practically speaking: how long does the visitor have to stare at a blank or loading screen before they can read what they came to read?
Good score: under 2.5 seconds
Needs improvement: 2.5 to 4 seconds
Poor: over 4 seconds
INP — Interaction to Next Paint
This is the newest of the three metrics, and it measures how responsive your website is to user input. When someone clicks a button or taps a link, how quickly does something happen?
A sluggish, unresponsive website feels broken — even if it technically works.
Good score: under 200 milliseconds
Needs improvement: 200ms to 500ms
Poor: over 500ms
CLS — Cumulative Layout Shift
This one is particularly frustrating for users. Have you ever been reading a page on your phone and had the text suddenly jump down because an advert or image loaded above it? That's a layout shift — and Google penalises websites that do it.
Good score: under 0.1
Needs improvement: 0.1 to 0.25
Poor: over 0.25
Why This Matters for Your Business
Google uses these scores as a ranking signal. A website with poor Core Web Vitals is less likely to appear on the first page of search results — even if everything else about your SEO is perfect.
For an Irish business competing locally in Cork, Munster, or nationally, this can make a real difference. Your competitors who have sorted their performance scores have an edge on you in search rankings.
How to Check Your Scores
The simplest way: go to Google Search Console (if you have it set up) and look under Experience > Core Web Vitals. This gives you real-world data from actual users visiting your site.
Alternatively, use Google PageSpeed Insights with your URL for an instant diagnostic.
Common Fixes
Most Core Web Vital problems come down to:
- Images that are too large or not optimised — compress images and serve them in modern formats like WebP
- Too many third-party scripts — every analytics tool, chat widget, and social media pixel you add slows your site down
- No font display settings — text that's invisible while fonts load contributes to both LCP and CLS
- No explicit size on images — if your images don't have width and height attributes, the browser can't reserve space for them, causing layout shifts
Getting Help
Core Web Vitals improvements are one of the most reliable ways to improve your search rankings — but diagnosing the problems and fixing them properly requires some technical knowledge.
If you'd like us to review your website's performance and give you a clear action plan, get in touch for a free discovery call. We do this regularly for Irish businesses and can usually identify the biggest wins within a day.