I am having trouble

I am having trouble understanding how Groups work in Buddypress. I used a WPMU tut (very easy to follow) https://premium.wpmudev.org/blog/buddypress-guide/?utm_expid=3606929-94.Ie3dH-CaRwe6MU3VrZsdvw.0&utm_referrer=https%3A%2F%2Fwww.google.co.uk%2F to check I had done everything correctly which resulted in the same issue I'm having on my main site. i.e. I cannot see how a User can create a Group; there doesn't appear to be a button anywhere I can see.