Creating gists→
You can create two kinds of gists: public and secret. Create a public gist if you're ready to share your ideas with the world or a secret gist if you're not.
Forking and cloning gists→
Gists are actually Git repositories, which means that you can fork or clone any gist, even if you aren't the original author. You can also view a gist's full commit history, including diffs.