What page speed is and why it matters
Page speed is not a single number but a set of measurements: how quickly the user sees content, how quickly the page responds to actions and whether the layout “jumps” while loading. Google summarizes this in the Core Web Vitals metrics and counts them among the “page experience” signals. It is one of many ranking factors and does not replace quality content, but a slow page loses visitors before they even see your offer — especially on mobile devices with a slow connection.
But even the fastest page will not bring traffic if it is not indexed, so also keep an eye on the page's indexing in Google.
What a StayIndexed check shows
- An overall score of 0–100 for mobile and desktop separately — the result of a Google Lighthouse test: 90–100 is good, 50–89 needs work, below 50 is poor.
- Key metrics with color grading — LCP, INP, CLS against the thresholds set by Google, plus TBT, FCP and Speed Index.
- Real-user data (Chrome UX Report) for the last 28 days — if Google has enough data for the page or the whole site.
- Improvement tips — the main problems found by Lighthouse, with an estimate of the potential time or size savings.
- Check history and the score trend, so you can see whether your changes really helped.
Core Web Vitals: which values are considered good
Lab and real-user data: what is the difference
Lab data is a controlled Lighthouse test on a simulated device and network. It is easy to repeat and compare, but it does not show what live visitors experience. Real-user data (Chrome UX Report) is measured on real Chrome users over 28 days; it is more accurate but exists only for pages with enough traffic. That is why INP is shown from real-user data, and when there is none, you will see its lab analogue, TBT.
To tell a slow website from a slow connection, check your internet speed.
How it works
Why a one-off check is not enough
The result of a single test fluctuates by a few points because of server load, the network and the page content at the moment of the check. Besides, speed degrades unnoticeably: a new script, a heavier image, an advertising widget or a plugin update — and the score drops without any notification. Regular checks show the trend: you see when exactly it got worse and whether your fixes helped.
It is just as worth checking backlinks regularly: links also disappear unnoticed.
Frequently asked questions
How do I check website speed?
The simplest way is to paste the page address into Google PageSpeed Insights. StayIndexed does the same automatically for several pages at once, keeps the history and repeats the check on a schedule.
Which Core Web Vitals values are considered good?
LCP — up to 2.5 s, INP — up to 200 ms, CLS — up to 0.1. Intermediate values (LCP up to 4 s, INP up to 500 ms, CLS up to 0.25) need improvement; anything above is poor.
Why does the PageSpeed score change between checks?
The lab test depends on server response speed, the network and the page content at the time of the run. A fluctuation of a few points is normal, so look at the trend over several checks.
What is the difference between lab and real-user data?
Lab data is a controlled Lighthouse test. Real-user data (Chrome UX Report) is measured on real users over 28 days and exists only for pages with enough traffic. INP exists only in real-user data.
Does website speed affect Google rankings?
Core Web Vitals are part of the page experience signals, but they are one of many factors and do not replace content quality. At the same time, speed directly affects how many visitors stay on the page.
How much does a speed check cost?
3 tokens per check (mobile and desktop versions together). Tokens are charged only for a successful check. 30 tokens are credited at sign-up — that is 10 checks.