It fetches SEO data, including URL, metadata, Schema categories, and more. The primary benefit of Screaming Frog's Spider is the ability to search for and filter various SEO issues. You don't have to have a deep knowledge of SEO to figure out what is and isn't done properly; the tool will help filter it for you.
The Screaming Frog SEO Spider is a fast and advanced SEO site audit tool. It can be used to crawl both small and very large websites, where manually checking every page would be extremely labour intensive, and where you can easily miss a redirect, meta refresh or duplicate page issue.