Website speed optimization services for real users

What our website speed optimization services include

Google measures speed with three scores, together called Core Web Vitals: how fast the main content loads, how quickly the page responds to a click or tap, and how much the layout jumps while it loads. Good means under 2.5 seconds, under 200 milliseconds and under 0.1, for at least three in four visits. Our website speed optimization services work on all three, starting with the one real visitors are failing.

We measure two ways: Lighthouse, Google's lab test, to find the problem, and Google's real visitor data over 28 days to confirm the fix. In between we work on images and loading order, heavy scripts, outside tags and fonts, and we track the result every month, split by mobile and desktop.

Why companies choose LASEO for page speed optimization

Speed plugins bundle files, delay images and cache pages around your problems. They never fix the heavy script that freezes the page or the web font that makes the layout jump. We work in your website's code instead, find the root cause of each failing score and make the fix ourselves. Your developers check and approve every change.

Brands like Bang & Olufsen and Canon Medical trust LASEO with their organic growth, and 98% of our clients stay. Speed work is part of our technical SEO, so every fix fits the rest of your site, from mobile to structured data.

Website speed for Google and AI search

Fast, light pages are easier for Google and for AI tools like ChatGPT and Perplexity to fetch and read in full. Speed also decides what happens next: when Google's AI Overviews or an AI chat links to your site, the visitor who clicks expects the page to load straight away, especially on a phone.

We test the questions your buyers ask and track how often AI tools mention your brand, next to your Google rankings. Read how AI SEO and a fast site work together.

Site speed optimization, explained without the marketing fluff

Core Web Vitals are three scores with precise definitions, measured in two different ways, and what you improve depends on which measurement you trust. Here is the honest breakdown.

Google's three speed scores explained

Largest Contentful Paint (LCP): the time until the biggest element on the first screen appears. Interaction to Next Paint (INP): how long the page takes to react to clicks and taps during a visit. It replaced the older First Input Delay score in March 2024. Cumulative Layout Shift (CLS): how much the layout jumps during the visit. Good means under 2.5 seconds, under 200 milliseconds and under 0.1, for at least three in four visits.

Lab tests vs real visitor data

Lab data comes from Lighthouse, Google's lab test, which loads your page on a simulated slow phone under controlled conditions. Field data is the Chrome User Experience Report: Google's record of real Chrome users on your site over a rolling 28 days. Field data feeds the Core Web Vitals ranking signal and the Core Web Vitals report in Google Search Console. Improving the Lighthouse score without checking real visitor data is improving the wrong number.

Why mobile is always slower

Phones have slower processors (often 4-6x slower than a desktop), slower networks (an average 4G connection is nowhere near home fibre), and they have to run the same JavaScript while heating up and slowing themselves down. The fix is not 'make the desktop site faster'. It is strict size limits for mobile, loading only the code each page needs and avoiding heavy outside tags.

Responsiveness is the score most sites fail

Since INP replaced First Input Delay in March 2024, sites that used to pass Core Web Vitals started failing. INP measures the full delay from a click or tap to the screen updating, so any long chunk of JavaScript work now hurts. Sites built heavily on JavaScript (React, Vue, Shopify Hydrogen) are hit hardest. Fixing INP is mostly JavaScript work, not network work.

An old speed trick is dead, and a better one replaced it

Chrome dropped HTTP/2 server push, an old way of sending files early, in 2022. The modern replacement is 103 Early Hints: a quick early message from your server that lets the browser start loading the most important files before the full page arrives. Cloudflare, Fastly and Vercel support it. Combined with telling the browser to load the main image first, it can cut loading time by 200-600ms.

Speed plugins cannot fix everything

WP Rocket, Autoptimize, NitroPack and their Shopify equivalents can bundle JavaScript, delay non-essential styling and add browser caching. They cannot fix a layout jump caused by a Google Ads slot, slow responses caused by heavy JavaScript that runs when the page starts up, or slow loading caused by a hero video with no preview image. Those need code changes.