What does a Git Tag mark?

A Git Tag is used to mark a specific point in time on a branch, often to denote a significant milestone, such as a release version or a key state of a project. Tags are easy to create and serve as a snapshot of the repository at a particular commit, providing a clear reference to that moment in the project's history. This makes it convenient for developers to refer back to this state without having to dig through the commit history to find the relevant commit.

Tags are crucial in versioning software as they help in identifying releases and facilitating deployments. By using tags, teams can communicate and reference specific states of their codebase easily, thus enhancing collaboration and understanding among team members. When marking a release, for example, a tag can indicate the version number, which can then be used in conjunction with release notes to inform stakeholders about what changes have been included.

The other options involve concepts that do not align with the primary function of a Git Tag. For instance, marking a branch to be deleted does not relate to the concept of tagging, while a deprecated feature does not have relevance to the tagging mechanism. Similarly, a contributor to a project is a different aspect of Git management altogether, focusing on collaboration rather than the specific historical marking that tags provide.