Let’s look beyond theory. Security researchers who run "Google Dorking" exercises (using advanced search queries to find vulnerabilities) regularly report disturbing findings using this exact query.
: This is the core "dork" operator. It instructs Google to only return pages where the browser tab title contains the words "index of". This is a hallmark of an open directory on a web server that lacks an index.html file. i+index+of+password+txt+best