Why your site is slow and what it costs
We measure the PageSpeed score and Core Web Vitals, and more importantly show the specific files making the page slow. A number without an address changes nothing.
PageSpeed score
Measured through Google PageSpeed Insights — the same engine Google itself uses.
Core Web Vitals
LCP, CLS and INP separately. One combined score never says which of the three is failing.
Specific files
Which image, script or font costs the most — with its address, not with a tip.
Mobile measured apart
Google indexes the mobile version. A desktop score can be perfect while mobile is half that.
What the three Core Web Vitals mean
LCP is how long the largest visible element takes to appear — usually the first image or the heading. It is the closest number to what a person means by “it loads slowly”.
CLS measures jumping: how much content shifts while the page is still loading. The most common cause is one easy fix — an image with no width and height, which shoves the text down just as someone starts reading.
INP is the response to a click. It replaced the old FID and is stricter: it measures not the first interaction but the worst — so it is ruined by heavy scripts still working after the page looks ready.
What you get out of it
Speed is a confirmed Google ranking signal, but it is rarely decisive — it separates pages that are otherwise similar. Expecting a jump from twentieth place to first from speed alone has no basis.
The real benefit is on the other side. A slow page loses the visitor before the first sentence, and that loss shows up in enquiries rather than positions. Fix speed for people, and treat any ranking gain as a bonus.
What a speed test is worth
The value is measured against the limits Google published: LCP under 2.5 seconds, INP under 200 milliseconds, CLS under 0.1. A page that holds them stops competing with its own speed — one that does not loses a share of visitors before they see any content.
There are two honest limits. First, the PageSpeed score is a LIVE measurement, so the same page returns a different number on two runs — the findings with addresses are worth your attention, the score is not. Second, part of the speed is not yours: hosting and plugins own it, and we say so separately.
Guide
Answers to questions about SEO, GEO and AI visibility. Every article answers in its first paragraph, then shows how to check it on your own site.
PageSpeed score: what it means and what not
What does the PageSpeed score actually mean?
Read more →
Why is my website slow and where to start
Why is my website slow, and where do I start?
Read more →
Core Web Vitals with no data: what it means
What does "not enough data" mean in the Core Web Vitals report?
Read more →
Sources
What this page rests on — primary documents, not retellings:
What else we can check
SEO audit
A free scan with five scores and a list of what to fix first.
Read more →
GEO audit
Whether AI crawlers reach you and whether your text fits citation.
Read more →
Security audit
Certificate, headers and what an outsider can see about you.
Read more →
GEO optimization
How to prepare website content for AI search and measure citations separately.
Read more →
SEO services
An audit, a consultation and website work with a separately agreed scope.
Read more →
Consultation
An hour with a person: what to fix first, hand over, or skip.
Read more →
Frequently asked questions
What counts as a good PageSpeed score?
90 and above is green, 50–89 is middling, below 50 is poor. But the score is a summary: which of the three Core Web Vitals is failing, and why, matters more.
Why is my score different every time?
PageSpeed is a lab measurement and depends on load at the moment of testing. Watch the trend rather than one number; real visitor data lives in Search Console.
What should I fix first?
Images. On almost every site they are the largest part of the page, and compression plus a modern format gives the most for the least work.
Are Core Web Vitals enough?
No. They measure experience but say nothing about whether the page is indexed or answers the question. A fast page Google cannot see stays invisible.
Start with what search and AI know about you today
The first scan is free and needs no account. The report stays available at its link.
Scan a domain →Updated