What this checks

Platform — WordPress, Shopify, Wix and other builders, themes, page builders and hosting clues.
Pages — how many pages the site lists in its sitemap, and how many pages this one links to.
Fonts — how many fonts are used, how many styles load, file size, format, and whether text stays visible.
Typography and style guide — font sizes and colours in the CSS, plus font pairing ideas and a starter style guide.
Mobile — viewport tag, breakpoints, fixed-width parts, adaptive images.
Speed and weight — response time, compression, image sizes, blocking files, caching.
Accessibility basics — alt text, labels, headings, link and button names.
Technology and security — HTTPS, security headers, WordPress and library clues.

The check reads the page’s code. It does not draw the page in a browser, so it cannot judge colours or how the layout looks. Each result says what it can and cannot see.