Version Control essentially tracks changes to files. Different Branches have different changes, which are then merged into one GitHub Repository. Generally, these branches are merged after pull requests, where teams can review changes and potential merge conflicts. When multiple people work on one repository, they do so by pushing and committing.
One of the best ways to use this repository is to simply clone it using a SSH key. You should be able to clone it in most terminals in this way by accessing the SSH link from the front page.
There isn't really any specific usage for this GitHub. I think that the most important thing is just to add things that you find cool. This can mean:
- Something cool you found on the internet that you would want to use later.
- It can be anything as long as it's cool
- Something interesting that you made that you want to show other people.