Git was named in many of the mobile developer adverts we read, in Ghana and remote, and teams that do not name it still expect it. Teams use it to work on the same app without overwriting each other's work, and employers look at your GitHub profile to see what you have really built. Learning Git early also protects you: if a shared lab computer is wiped, your code is safe online.
What Git does
Git is a version control tool. It keeps a history of your project, so you can see what changed, when and why, and go back if something breaks. Each saved snapshot is called a commit, with a short message describing the change.
GitHub is a website that stores Git projects online, called repositories or repos. It is free for public and private repos, and it is where you will show your portfolio.
The everyday commands
The simplest start is to create an empty repo on the GitHub website, then copy it to your laptop and work inside that folder:
git clone https://github.com/your-name/shop-app.git
cd shop-app
git add . # choose the changes to save
git commit -m "Add product list screen"
git push # send commits to GitHubOn another computer, such as a lab machine, clone the repo once, then run git pull at the start of each session to get your latest changes.