The moment you create a repository, you will find a .git directory present inside it. This .git directory contains all the metadata of the repository and maintains a track of all the changes made to the files in your repository, by keeping a commit history.
All the information regarding commits, hooks, refs, object databases, remote repository addresses, etc. are kept inside this folder. This is the most crucial part of Git. When you clone any Git repository on your local machine, this .git is the directory that actually gets copied.
