sebgroup.com website review

Your mobile performance score is 79. Pages that score under 90 lose visitors before the first paint.

4 files block the first paint until they finish downloading. Deferring or inlining them could save about 900 ms.

About 126 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 460 ms faster on a phone.

4 files are served with short cache lifetimes, so returning visitors download them again (68 KiB).

Optimizely costs a phone 0 ms of main-thread work and 411 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

2 long tasks block the main thread while loading, the longest for 249 ms. During a long task the page ignores taps.

2 third-party services load with your homepage (Optanon and Optimizely), adding 623 KiB and 91 ms of main-thread time.

4 images could be 119 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen.

About 51 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 10 ms faster on a phone.

Polyfills for old browsers add 9 KiB JavaScript that modern phones do not need.

Critical files load one after another instead of in parallel (3 chains). Preconnecting to key origins and preloading the hero image shortens the chain.

Real Chrome users on phones do not pass Google's Core Web Vitals on this page (28-day field data from the Chrome UX Report (opens in a new tab)). Google uses this in ranking.

Your largest element takes 4.2 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the image.

For real visitors the layout shifts by 0.12 (75th percentile). Good is under 0.1.

The page becomes fully interactive after 6.7 s. Good is under 3.8 s.

Visually, the page fills in at 4.5 s (Speed Index). Good is under 3.4 s.

The layout shifts by 0.103 while loading, so content jumps under the reader's thumb. Good is under 0.1.

By the Sustainable Web Design model, a visit to your homepage emits about 0.39 g of CO₂e: 46.3 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

4 text elements don't have enough contrast against the background to read easily, especially outdoors on a phone.

ARIA dialog and alertdialog nodes should have an accessible name: 1 element on the page fails this check, rated serious by axe-core.

No structured data (JSON-LD), so Google can't show rich results such as your logo, ratings or FAQs.

No twitter:card tag. X falls back to Open Graph, which is set, so this is minor.

The homepage links to 19 pages on sebgroup.com and 1 external page.

A phone browser shows 312 words, but the HTML your server sends has only 83. GPTBot, ClaudeBot and PerplexityBot read that HTML without running JavaScript, so they see an almost empty page. Server-side rendering or pre-rendering fixes it.

There is no Organization (or LocalBusiness) JSON-LD, so search engines and AI assistants have no machine-readable facts about who runs the site: its name, logo, profiles and contact details.

There is no https://sebgroup.com/llms.txt, a short Markdown guide to your key pages for AI tools (llmstxt.org). It is optional and few AI tools read it yet, so treat it as a cheap extra.

https://sebgroup.com/legal-and-regulatory-information/legal-notice has no meta description, so Google writes the search snippet from whatever text it finds.

We fetched 15 pages linked from your homepage (of 18 found) and read each the way a search engine does.

Large scripts ship without source maps.

On a phone, there is no call to action on the first screen: visitors have to scroll to find out what to do next.

No testimonials, customer logos, ratings or customer counts on the homepage: nothing tells a new visitor that others already trust you.

No analytics or tag manager detected in the HTML, so you can't measure whether any of these fixes work.

No phone number or email link on the homepage, so ready-to-buy visitors have one fewer way to reach you.

There is no form on the homepage, so every lead has to click through to another page first.

No guarantee or risk reducer (money-back, free trial, no credit card) is mentioned, which is often what tips a hesitant visitor.

The homepage carries about 312 words of visible text.

Opening the homepage sets 7 cookies (measured from a US location before any click).

Loading the homepage contacts 6 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.