Knowledge
The foundations of the web that decide whether a website loads quickly, gets found and works for everyone. Each topic is explained plainly and backed by its sources.
Weight
- Page weightPage weight is the total amount of data a browser transfers to display a web page, from the HTML document to every image, script and font.
- Image formatsAn image format is the method by which a picture is stored as a file; it determines file size, visible quality and which browsers can display it.
- CompressionHTTP compression shrinks text files such as HTML, CSS and JavaScript on the server before they travel, and the browser restores them on arrival without loss.
- Web fontsA web font is a font file that a website delivers along with its pages, so that text appears in the intended typeface even when the visitor's device lacks it.
Speed
- Static site, CMS or backendA static site produces its pages in advance, a backend computes them at each request, and a content management system (CMS) adds an editing interface to either approach.
- Lazy loadingLazy loading defers images and embedded content until the reader scrolls near them, so the browser spends the first moments on what is actually on screen.
- Core Web VitalsCore Web Vitals are three metrics defined by Google that describe how real visitors experience a page: loading (LCP), response to input (INP) and visual stability (CLS).
Search and AI
- Search enginesA search engine discovers pages by following links, stores what it reads in an index and, for every query, ranks the indexed pages it judges most useful.
- AI assistantsAI assistants such as ChatGPT, Claude, Perplexity and Google's AI Mode answer many questions by running a live web search, reading selected pages and citing some of them.
This website, measured
This website, measuredLight
138 KBHome page, transferredHow we measured: Home page, transferred- Measured
- Data transferred for the home page, mobile
- Date
- 9 Nov 2026
- Tool
- Lighthouse 13.6.0
A lab value on localhost, not a visitor's network.
All measurement methodsThe home page of this website needs less than a tenth of the data of a typical mobile home page. Visitors see the offer sooner, even on a weak connection.
Fast
1.15 sLargest Contentful PaintHow we measured: Largest Contentful Paint- Measured
- Performance, accessibility, SEO and LCP of the home page
- Date
- 9 Nov 2026
- Tool
- Lighthouse 13.6.0
An SEO score promises no ranking, and automatic tests find only some barriers.
All measurement methodsEvery page of this website exists as a finished file before anyone visits. Its home page shows the main content in less than half the 2.5 seconds Google rates as good.
Visible
100Lighthouse SEOHow we measured: Lighthouse SEO- Measured
- Performance, accessibility, SEO and LCP of the home page
- Date
- 9 Nov 2026
- Tool
- Lighthouse 13.6.0
An SEO score promises no ranking, and automatic tests find only some barriers.
All measurement methodsOn this website, the build stops any page that lacks its own title, description or structured data. That is the groundwork for being found on Google and named by ChatGPT, Perplexity or Claude. Nobody can promise a ranking.
Accessible
100Lighthouse accessibilityHow we measured: Lighthouse accessibility- Measured
- Performance, accessibility, SEO and LCP of the home page
- Date
- 9 Nov 2026
- Tool
- Lighthouse 13.6.0
An SEO score promises no ranking, and automatic tests find only some barriers.
All measurement methodsGood contrast keeps text legible with weaker eyesight and on a phone in sunlight. On this website, every text passed the contrast measurement and every control the keyboard test.