It's now possible to tag groups through content tagging, just like it’s already possible with Events, Books and Topics. This also needs to be enabled by the Site Manager on the tagging settings page, which is also similar to other content types. Users can use these tags within the search page to search for groups.
How to enable this feature
This feature can be enabled on the 'Social tag settings' page which can be reached via the site manager dashboard.
Please note that the group tagging fields will only be available once content tags are configured.