`git tag` Label a commit, such as a release

Creates a fixed name for a point in history, typically a version number like v1.2.0. Unlike a branch, a tag does not move.

Synopsis

git tag [OPTION]... [NAME [COMMIT]]

Option or form	What it does
`-a NAME -m MSG`	Make an annotated tag with a message, author and date
`-l PATTERN`	List tags, for example -l "v1.*"
`-d NAME`	Delete a local tag
`-f`	Move an existing tag
`-s`	Sign the tag with your GPG key

Tag the current commit as a release

git tag -a v1.2.0 -m "Release 1.2.0"

List tags

git tag -l "v1.*"

v1.0.0
v1.1.0
v1.2.0

Tag an older commit

git tag v1.1.1 8b1d7e4

Publish a tag

git push origin v1.2.0

Delete a tag locally and on the remote

git tag -d v1.2.0
git push origin --delete v1.2.0

git push does not send tags by default. Push one by name, or all with git push --tags.
Use annotated tags (-a) for releases. They store who made them and when.
On GitHub, gh release create TAG can also create the tag for you.