General help

Hello all,
I tried searching for this answer with hundreds of results none with the correct info.

I thought I saw at one point in the docs a way to allow the google bot to index my site without authenticating? Can anyone please point me to the correct doc on this? Is this a mod? Im not sure if It actually was moodle you were able to do this with.  I Hope so.. Any help would be great!

Thanks a bunch!