Website Speed Test: How to Read PageSpeed Insights

Why speed matters for your sales

Most visitors arrive on a phone: from an Instagram ad, a link in a Telegram channel, Google search, an OLX listing or a marketplace like Uzum. They tap and wait. If the page drags, they leave, and you have already paid for that click in Meta Ads or Google Ads.

So speed is part of the sales funnel, not a developer hobby. A slow site makes the same budget in soums bring fewer enquiries.

Two kinds of data in a PageSpeed Insights report

The report has two blocks, and they should not be confused. Field data comes from real people who opened the page over recent weeks. This is what Google takes into account when judging page experience. If a page has little traffic, this block may be missing, which is normal for new sites and narrow pages.

Lab data is a one-off simulation on a slow device and an average connection. It is not a verdict. It is a way to find causes: which image is heavy, which script blocks the page. The result shifts a little from run to run, and that is expected.

Core Web Vitals in plain words

At the top of the report sit three key metrics. For each, Google shows a status: good, needs improvement or poor.

• LCP: how long it takes for the main content to appear, such as the hero image, the headline or the first screen.
• INP: how quickly the page reacts to taps and typing, for example on an Order button, a menu or a lead form.
• CLS: how much elements jump around while loading, such as a button sliding down just as someone taps it because a banner appeared.

Why a perfect 100 is the wrong goal

The score from 0 to 100 comes from the lab test, which depends on network and server conditions. The same site can get different scores minutes apart. A site that scores 70 but has good field metrics may serve customers better than one that scores 95 in the lab while real visitors complain.

Focus on the Core Web Vitals status and field data. Use the score only as a rough way to compare before and after a change.

Check the mobile tab first

The report has mobile and desktop tabs. Mobile is stricter because it simulates a weaker device and a modest connection. A Tashkent office on fibre may see everything open instantly, while a customer in a regional city on mobile data sees something very different. Your buyers are often that second person, so treat the mobile result as the main one.

What to fix first

Further down, the report lists opportunities, each with an estimated time saving. Start with the ones that save the most rather than trying to clear the whole list.

• Optimise images: compress product photos, use modern formats, do not send huge banners to phones.
• Remove unused CSS and JavaScript.
• Defer non-critical scripts such as chat widgets and review plugins.
• Reduce server response time: hosting, caching, heavy plugins.
• Cut third-party scripts, especially pixels and counters added just in case.

Test templates, not only the homepage

A site is built from templates: homepage, category, product or service page, blog article. A template problem repeats on every page of that type, so testing one page of each kind and fixing the cause once is enough. Pay special attention to product pages and the landing page your ads point to, since paid clicks land there.

If the report is long and it is unclear which items affect enquiries and which are cosmetic, that is a question of priorities, not only of technology. At markdev we help work out which speed fixes will pay off for your business and fit them into a wider marketing strategy. Send us your task and we will talk through where to begin.