 This is how you curate your public profile URL, so you go to the right-hand side here and you click on the pencil symbol and on the top right-hand side here, you'll see that mine is already customised with my name there, but to change it I would click on the pencil symbol, put in the name I desire there, as it says it must be between three and 100 letters or numbers and you're not allowed to use spaces symbols or special characters and when you're done you can click save