No one talks about that 'cause it’s stupid. Google made a tons of products free for everybody and you have to 'knock' at the door of Big G before join in its world.
Do you want a single account with:
- 15GB of free space on Google Drive (google docs, sheets, slides)
- a secure Email;
- YouTube account;
- Keep account useful for take notes directly from your phone;
- chance to sign up to a website or app using just a Gmail;
Of course you can just use all of them or just one of these products.