git is a very complex undo/redo tool designed to simultaneously track the changes made to multiple documents by multiple users while being efficient with managing disk space and other resources. (It also has other clever tricks it can do). It was created by Linus Torvalds, current development is led by Junio Hamano.

Chris Wanstrath, P. J. Hyett, Tom Preston-Werner and Scott Chacon made GitHub.com, which was eventually sold to Microsoft. GitHub does two things well: -You can easily clone any project hosted with them to your own git repository using the command 'git clone https://github.com/[Username]/[ProjectName]' -The rest of the public website is basically a looking glass for everything git does under the hood natively (but with a nice webUI instead of a cold command prompt).

Personally I lost faith in GitHub when it started offering Copilot assistant. We're only a two heartbeats away from Microsoft saying that using Copilot for any of your projects code constitutes Microsoft contributed to that project as a precursor to Microsoft saying it basically 'owns' all this open-source stuff. Embrace, extend, extinguish (I recommend everyone run docker and GitTea to create a personal clone store (give your favorite projects insurance) and that all developers move away from GitHub)