You can create a group right from the Groups page. If you don’t have any groups yet, just click the "Create a group" button. Already have some? Hit the “+” in the top-right corner to add another. Nice and easy!
Clicking this button will open the "Create a group" dialog. Simply give your group a name and you're good to go!
Note: if you turn on sharing for your group, its name will automatically appear on any shared link.
If you want to use a different name for public pages, just check “Show a different name when sharing” and pop in your preferred sharing name.
You can edit your group whenever you like and add, change, or remove the Sharing name anytime.