Why Version Control Exists (And Why You Should Care)

Before a single command, and before the word Git even comes up — let's understand the very human, everyday problem this tool exists to solve. We've all done it: saved a file called project_final, then project_final_v2, then project_final_for_real_this_time. It works until it falls apart. In this les

Version control is like a giant 'undo' (Ctrl+Z) for your whole project, plus a perfect memory: you can jump back to any day in the past, see what changed, and who changed it.

Version control: A way to keep every version of a project over time, so you can go back, compare, and collaborate without losing work.
Git: The most popular version control tool. It runs on your own computer, is free, and is used at almost every software company in the world.
History: The sequence of all the saved versions of the project, from the first to now — a kind of journal you can page back through.
Collaboration: When several people work on the same project. Version control lets each person work in parallel and then combine the work without overwriting.