To see the tags:
To make a tag called v0.1:
git tag v0.1
To add a comment (annotation) to your tag when you make it:
git tag -a v0.1 -m "This is the beginning state"
Notice the -a, which stands for annotation
You can view information about a tag like this:
git show v0.1
Your tag is local unless you explicitly push it like this:
git push origin v0.1
To are two ways to list of all your tags:
git tag -n1 git tag -n -l
NOTE: The first instance uses the number one, the second the letter el.
On GitHub, you can go to the main page for your repository, click the button that says Branch master, and switch to the tags page. You will see your tags.
Here are the official documents on tags:
A tag marks the state your repository was in at the time you tagged your files. It doesn't have anything to do with pushing files, it just marks a place in your repository.
If you add, commit, push, and then tag, that tag will point to the place in your repository where you pushed that last set of files.
If you tag, then add, commit and push, your tag will point to the place in your repository just before you pushed.
If you tagged a repository at 3 PM on March 5, 2017, then you can get back to the way your repository looked at that point in time by creating a branch on that tag.
By the "place in your repository", I mean the point in the time-line of your repository at which you tagged your repository. Among other things, it says: "if you want to see what my repository looked like at the time I tagged it, then create a branch based on this tag."
Copyright © 2017 by Charles Calvert