There is no modification, it’s just a handy shortcut, read about bangs here. You are not expected to use !g for all searches, only for those that you wish to search with Google. It’s also possible to replicate this with browser search settings, DDG just has this built-in.
Does it filter out the shite?
There is no modification, it just redirects you to the site
Does it prevent Google from getting your info or something so or what is the benefit in this over using Google?
There is no modification, it’s just a handy shortcut, read about bangs here. You are not expected to use !g for all searches, only for those that you wish to search with Google. It’s also possible to replicate this with browser search settings, DDG just has this built-in.