Building
What is a repository?
A repository is a project folder that keeps a complete history of every change made to it. It lets you see what changed and when, and go back to any earlier state. On GitHub it also lives online, which is how people share and back up their work.
You do not need one to build something, and Ura never forces one on you. Projects are local by default, and stay that way unless you decide otherwise. What a repository buys you is the ability to undo a bad afternoon completely, and to hand the whole project to somebody else without losing anything.
If a tool tells you it will create a cloud repository for you before you have asked, it is worth knowing that is a decision being made on your behalf, and one you may want to make yourself.