A Beginner's Guide to Git & GitHub

The Skill Every Employer Assumes You Have

Before interviews about React or databases, there is a silent filter: can this person use Git? Every company keeps its code in a repository, and every team workflow runs on branches and pull requests. You cannot apply to a junior role without it — and you should not want to, because version control protects your own work too.

Git is a version-control system that records snapshots (commits) of your project over time. GitHub is a hosting service for Git repositories — think of Git as the engine and GitHub as the garage where the car lives and other people can look at it.

Install and Configure

Install Git from the official site, then set your identity once:

git config --global user.name "Your Name"
git config --global user.email "you@example.com"

These attach your name to every commit. Do it before you start, or you will rewrite history later to fix it.

The Core Loop: Add, Commit, Push

The daily rhythm of a developer looks like this:

git status                 # what changed?
git add .                  # stage the changes
git commit -m "add login form"   # snapshot with a message
git push                   # upload to GitHub

Three rules make this loop painless:

Commit often. A commit per logical change, not per hour. "add login form" is a good message; "stuff" is not.

Commit messages in the imperative mood. "Add", "fix", "remove" — this matches how Git itself writes its history.

Check git status before you commit. You never want to commit your node_modules, .env, or API keys. Add a .gitignore file on day one.

Undoing Mistakes

Everyone breaks something. Git exists so it hurts less:

git restore          # discard uncommitted changes
git log --oneline          # see history
git reset --soft HEAD~1    # undo last commit, keep changes

The golden rule: if you already pushed it, don't rewrite it — use a new commit to fix the old one. Pushed history is shared history.

Branches: The Superpower

A branch is a parallel version of your code. You work on a feature in isolation, then merge it back:

git checkout -b add-navbar   # create + switch
# ... code, commit ...
git checkout main
git merge add-navbar

Branches are why teams can work on the same codebase without stepping on each other. For a solo learner they are just as valuable: try experiments in a branch, keep main clean and always working.

The GitHub Workflow: Pull Requests

A pull request (PR) is a request to merge one branch into another, with a code review in between. The standard flow:

Push your feature branch to GitHub.

Open a PR against main.

Someone reviews and comments.

Address feedback with more commits.

Merge when it passes.

For a beginner, a PR is a free code review. Put your projects on GitHub, open PRs even into your own repos, and ask mentors to review them. This is the single highest-leverage habit in this guide.

Merge Conflicts: Not a Failure

A conflict happens when two branches change the same lines. Git pauses and asks you to decide. The workflow:

Run git status — conflicted files are marked.

Open them and edit the conflict markers (<<<<<<< / ======= / >>>>>>>).

Keep the correct version, git add, then commit.

Conflicts are a normal part of collaborative work. What separates professionals is not avoiding them but resolving them calmly.

Practice Git on Every Project

You do not need a dedicated Git course. Make it part of how you build:

Create a GitHub repository for every project you build.

Commit after each working feature.

Write a README.md explaining what it is and how to run it.

Push early and often — a pushed project is proof; a local folder is invisible.

This is also why our Full Stack MERN bootcamp treats a well-maintained GitHub as a graded deliverable: employers judge your repository before they judge your résumé.

Git and the MERN Stack

Git connects naturally to the rest of the JavaScript ecosystem — package managers, deployment platforms, and CI all build on repositories. To see where version control sits in the wider picture, read our MERN stack guide, then work through the Full Stack cluster to keep the momentum going.