You uploaded index.html, switched on Pages,
and the internet did the rest. That's it. That's web publishing.
How you got here
You made a new repository on GitHub and named it something sensible. That's your project's home.
You added this file to the repo. GitHub looks for index.html by default โ that's the page it serves.
Settings โ Pages โ Source: main branch. GitHub builds and deploys your site automatically.
GitHub gives you a public URL at username.github.io/repo. Share it. It works on any device.
No terminal needed
You don't need Git or a terminal to get files into GitHub. You can drag and drop straight from your desktop into the browser. Here's how.
Go to github.com and click into your repository. You'll see the list of files.
Find the Add file button near the top right of your file list. Choose Upload files from the dropdown.
Drag index.html from your desktop straight into the dashed upload area. You'll see it listed ready to commit.
Scroll down, write a short message like add index page, then click Commit changes. GitHub Pages picks it up within a minute.
Replacing a file? Upload a new version with the exact same filename. GitHub overwrites the old one and your live site updates automatically after the next deploy.