We all have been through that process of clicking on links, watching the loading of the pages, but giving up without waiting till the complete loading of the page. It is this immediate decision that links SEO and Page Speed together as a related concept today. Not only will a slow-loading website turn away your customers, but will also communicate to Google not to rank your website high in the search engine result, and eat into your conversions before your customers even learn about your offerings.
The idea of making your website faster is a rather vague idea to begin with. To be able to make your website faster, you need to learn about what Google expects, how does Google measure the speed of your site, and which are the most relevant metrics in terms of this measurement. This is exactly what Google PageSpeed Insights helps you do, and this is exactly what any digital marketing agency in Dubai should learn about before making any changes to your website.
Let’s see what are the most important Google PageSpeed Insights metrics explained in an easy manner.
Largest Contentful Paint (LCP)
Largest Contentful Paint LCP evaluates the time that elapses before the largest object on the page is fully rendered. This may be a hero image, large heading, or essential content. The measure starts after the page begins loading.
The importance of LCP stems from the fact that this metric is equivalent to the moment when users recognize “the page has been really loaded”. In case LCP is fast, it indicates that the required content is loaded. Otherwise, users will inspect an empty page trying to understand what has gone wrong.
First Contentful Paint (FCP)
Prior to LCP, there’s First Contentful Paint (FCP). This is when the first piece of actual content (be it text, images, or other valuable stuff) is painted on your page. Note that it is not the same as First Paint because First Paint can show up just some background color, some empty header, or anything else without any meaningful content.
FCP is the stage where a user stops looking at an empty page and sees that something appears on the page. FCP doesn’t indicate the load of the main content (that’s the function of LCP), but it is an early indicator of your page responsiveness.
Time to Interactive (TTI)
TTI or Time to Interactive defines the time elapsed until the page is not only visible, but also interactive, that is, when a visitor can click, scroll, and input data on the page without getting any response or lag from it.
According to Google, a page becomes “interactive” when three criteria are satisfied:
- The content useful for the user has been loaded onto the page
- Most visible objects have event handlers attached to them
- A page responds to any user actions within about 50 milliseconds
Simply put, TTI is the moment when a visitor stops watching the page and starts interacting with it.
Total Blocking Time (TBT)
It is a metric that shows how much of this delay between FCP and TTI is taken by the browser being busy with something and not paying attention to the user. The value of the TBT metric is computed by adding all long tasks that happen during this period. Long task means any event on the main thread that takes more than 50 milliseconds to complete.
In other words, if a certain script runs for 70 milliseconds, only 20 out of them count for the TBT metric.
Cumulative Layout Shift (CLS)
One of the most frustrating things for any user is the moment when you try to click a button, and then just before your finger touches it, the entire page moves under your fingers and you accidentally click something else. This very concept is called the Cumulative Layout Shift CLS.
CLS suddenly became an important part of the Core Web Vitals update by Google, and with good reason – because layout shift affects usability and trustworthiness, even on pages that “load quickly”!
Speed Index
Page Speed Index is somewhat different in that it does not determine one particular moment but rather how fast the visible content on the page loads in general, measured in seconds. The Page Speed Index number is calculated by Google with the help of Speedline plugin in comparison to Google benchmarks collected by HTTP Archive.
Putting the Metrics Together
| Metric | What It Measures | Why It Matters |
| FCP | Time until first content appears | Signals the page isn’t blank |
| LCP | Time until largest content renders | Signals main content has loaded |
| TTI | Time until page is fully interactive | Signals the page is truly usable |
| TBT | Time the main thread is blocked | Signals responsiveness to input |
| CLS | Unexpected layout movement | Signals visual stability |
| Speed Index | How quickly content visually populates | Signals overall perceived speed |
No one number tells you everything you need to know about performance even if a single page scores high on FCP, it could fail to load due to poor CLS or a bad TTI score. Optimization cannot be done by looking at just one metric you have to examine everything as a whole and try to understand what is making the load time so slow.
Why This Matters for Your Business
In case the page speed is considered to be only a technical measure for vanity, this does influence the time a visitor spends on a page, his conversion rate and, what is even more important, page ranking. For each company involved in SEO, the approach to all these page speed metrics, which should be treated as a checklist, but not just fancy words, is the key to retaining visitors rather than losing them.
In case you are not sure about the current situation on your page regarding all these metrics, there is always an option to hire a reliable digital marketing company in Dubai, which will conduct diagnostics and fix all issues depending on their influence, not trying to do everything at once. The matter of fact is that faster pages get higher ranking, which leads to the higher traffic, and, in turn, better conversion.
FAQs
What is a good PageSpeed Insights score?
A score between 90-100 is considered to be good (“fast”), from 50 to 89 – requires some improvements, and below 50 – is considered bad. However, the value itself is not so important as what metrics are bad in this case.
Which Page Speed metric is important for SEO?
The Core Web Vitals consist of Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS) and Interaction to Next Paint (TBT successor). They are most related to rankings in Google search engine.
Why is the Page Speed score high on desktop but low on mobile?
Mobile devices usually have less CPU performance and slower internet connection. The script and images that work quickly on desktop can significantly impact loading time on mobiles.
Can I have a high Speed Index score, yet a bad user experience?
Yes, because Speed Index shows loading time only and doesn’t consider layout shift and interactivity of website.
How often should I check my Page Speed Insights score?
It would be great to check the score after all changes on the website, and once a month as routine process, in case there were no updates.
How can a digital marketing company in Dubai help me?
An experienced team can understand exactly which metric affects the score, and why (for example, unoptimized images can negatively affect LCP, render-blocking scripts TBT, etc.).