What are Git and GitHub, and why does your website need them?

Git is the tool. GitHub is the place. GitHub is a website where your folder, with every snapshot Git ever took of it, lives online. You can browse your files there, edit them, see the history, and let other people (or an AI assistant) work on them.

You can use Git without GitHub, and there are other places like it. GitHub is the one almost every host and every AI coding tool connects to, so it’s the one we use.

That’s honestly most of it. Branch, check, merge. The rest is detail.

• You own it. The code sits in your account, not inside a builder or an agency’s server. You can take it to any developer or any host.
• Nothing is ever lost. Every version of every file is kept, so any mistake is reversible.
• It publishes your site. Connect a host once and every change to main goes live by itself. No uploads.
• Help can’t break the live site. A developer or an AI works on a branch, you look at a preview, and only then does it go live.
• There’s a paper trail. Who changed what, when, and why, forever.

This is the piece our client was missing when they got stuck in the builder. The code existed, but not anywhere they controlled. Part one tells that story.

1. 01Create an account at github.com with your business email. Pick a username you’d be happy to show a client.
2. 02Turn on two-factor sign-in under Settings, then Password and authentication. This account will hold your whole website, so treat it like your bank login.
3. 03Get your site into a repository. If you built it in v0, use its GitHub option to create the repo in your account. If a developer built it, ask them to transfer the repository to you, or to add you as an owner.
4. 04Keep it private. Private repositories are free, and a business site has no reason to show its code to the world.
5. 05Invite help as a collaborator, not an owner. In the repository, go to Settings, then Collaborators, and add them by username. You can remove them any time.

The one rule: the repository lives in your account. Developers and agencies come and go. Your site shouldn’t go with them.

Open your repository on GitHub and click the commit count near the top of the file list (it says something like “214 Commits”). That’s every change ever made, newest first, each with its note and who made it.

Click any commit to see exactly what changed: removed lines in red, added lines in green. You don’t need to understand code to spot that “Open 9 to 5” became “Open 9 to 6.”

Two easy ways, depending on how the change got in.

1. 01If it came in through a pull request: open the merged pull request on GitHub and click Revert. GitHub makes a new pull request that undoes it. Merge that one and the site goes back.
2. 02If it was saved straight to main: open GitHub Desktop, go to the History tab, right-click the commit and choose “Revert changes in commit”, then click Push origin.

Either way, nothing gets deleted. Git adds a new snapshot that reverses the old one, so the mistake and the fix both stay in the history. That’s a feature.

No. GitHub’s website handles small edits, GitHub Desktop handles everything else, and an AI assistant can do the Git part for you. But if you’re curious, these are the only commands most site owners ever need.

git clone <repo-url>      # download the site to your computer, once
git pull                  # get the latest changes
git switch -c new-hours   # start a branch called new-hours
git add .                 # stage everything you changed
git commit -m "New hours" # save a snapshot with a note
git push                  # send it up to GitHub

Next, part three puts this to work: editing your own Next.js site, right on GitHub.

GitHub backs up your code, not everything around it. Your domain, your email, your DNS settings, and whatever your forms collected live somewhere else, and need their own logins written down somewhere safe.

It’s also not a place for big media. GitHub blocks any single file over 100 MB and gets slow well before that, so long videos belong on a video host, not in your repository.

And it isn’t an editing dashboard. If your team wants to type posts into a friendly screen and press publish, that’s a content management system on top of GitHub, not GitHub itself.