What is Git and why does my code need it?

Git is one of those tools that sounds forbiddingly technical and turns out to be one of the most useful ideas you can adopt, even if you never touch code. At heart it is an undo button and a time machine for your whole project, and getting your app into it is a quietly powerful act of ownership.

What Git does

Git is a system that watches your code and records every change you make, one snapshot at a time. Each snapshot, called a commit, captures exactly what the code looked like at that moment, along with a short note about what changed. The result is a complete history of your project: not just where it is now, but every step of how it got there. Because that history is kept, nothing is ever truly lost. If a change breaks something, you can go back to any earlier snapshot and see, or restore, exactly how things were before. Think of it as an infinitely detailed undo, but for your whole app, that never forgets. Ordinary saving overwrites the past; Git keeps it. That single property, a full, reversible record of every change, is what makes it the standard way serious software is looked after, whether written by a person or an AI.

Git versus GitHub

These two names get used together so often that people assume they are the same thing, but they are not. Git is the system that tracks changes; it can run entirely on your own computer. GitHub is a popular online service where Git projects are stored, shared and worked on together, in the cloud. The relationship is like the difference between the idea of writing letters and a specific post office. Git is the method; GitHub is the widely-used place your project lives online, safe from your laptop being lost or broken, and reachable by anyone you invite to help. There are alternatives to GitHub, but it is the common default, which is why AI builders so often offer to connect your project to it. When someone says push your code to GitHub, they mean take the Git history of your app and store it on that service, so it lives somewhere durable and shareable rather than only on your machine.

Why your app benefits from it

For an AI-built app, Git delivers a few concrete goods. First, safety: a full history in GitHub means your code exists somewhere beyond the builder and your own computer, so no single failure can lose it. Second, reversibility: when a change breaks the app, and changes do break apps, you can roll back to the last version that worked instead of frantically trying to remember what you altered. Third, collaboration: the day you bring in help, Git lets someone work on your app without overwriting your work or you overwriting theirs, because it tracks who changed what and merges it sensibly. And fourth, portability: a Git repository is the standard package a host expects, so having your code in Git is what lets you deploy it wherever you choose. Even if you never learn a single Git command yourself, having your app in Git is the foundation that all of these depend on.

Getting your code into Git without becoming an expert

The good news is you can get all of this benefit without mastering Git's inner workings. Most AI builders offer to connect your project to GitHub directly: look for an option to link or export to GitHub, and follow it to create a repository in your own account. From then on, your changes are captured and stored automatically, and you have a durable, versioned copy of your app that is yours. You do not need to memorise commands or understand branches to benefit; those become useful later, if you or a helper work on the code more actively. The essential move is simply to make sure your app lives in a Git repository you own, rather than only inside a builder. That one step gives you the safety net, the history and the portability, and it turns your code from something trapped in a tool into an asset you genuinely hold.