The backlinks retrieved by Google's "link:" command are generally from:
- The most commonly used link sources;
- Web pages with a higher number of internal links within a site.
It is important to note that in Google's backlink results, 301 or 302 redirected links may be included. However, broken links and links blocked by robots.txt will not be included. Additionally, Google will consolidate some 301 redirect information from different domains and automatically append a trailing slash at the end of URLs when appropriate.