It does not query ChatGPT, Perplexity, Google AI Mode, Copilot or Claude. It never asks an engine whether you appear. It reads what your site publishes, which is the part you control and the part every engine reads first.
It does not count your backlinks. That needs a paid link index. The backlink work measures them: who links to you, who links to your competitors and not to you, and which to go after first.
It does not crawl your site. One page, plus three files at the root of your domain. The rest of the site is not checked.
It does not measure rankings, traffic or conversions. Those need your Search Console and your analytics, and nobody should hand those to a free tool. With your permission, I can go through them with you on a free 20-minute call.
It does not run JavaScript. It sees the HTML your server sends, the same way most AI crawlers do. If your page is empty until a script runs, this tool will say so, and so will they.