Welcome! Today we're going to learn about GitHub and how to use it for version control – that is, to keep track of changes in a set of files.
You're in a repository, often abbreviated to repo, which is just a fancy way of saying a folder. It's a bunch of files. It can have subfolders inside it. See the files and folders up above this text?
This text is, itself, coming from a single file inside the repository, with the special name of README.md. Anything appearing in the README file will show up here, on the repo's landing page.
The file extension, '.md', refers to Markdown, a simple syntax for signaling display formats (bold, italic, bullets, headings, etc) in plain text files. As you can see here, GitHub knows how to render markup like **repo** in bold and _folder_ in italics. There are many more features; as an EXT, you could check out an overview of Markdown syntax you can use.
Markdown lets you link not only to other websites, but also to other files in the repo, like this-is-just-to-say.txt. Let's look at that one together!
You'll find the instructions in your-turn.md.