Include all public discoverable groups in autocomplete when @targeting
With Include all public discoverable groups in autocomplete when @targeting turned off, when a user types @ and part of a name, they'll get a list of potential matching people from among communities and spheres which they are following only.
Type '@' and part of a name to get the list of matching people
When this checkbox is selected, all public discoverable groups autocompletes in addition to the groups the user is following. This functional only works if the feature to autocomplete all users is also selected.