What is the precise definition of the default git branch?

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The default git branch is the primary branch in a git repository that is created automatically when a repository is initialized. The default name of the primary branch is typically "master" but in recent years some communities have moved towards using "main" as the default branch name. This branch is also the base from which other branches are created, and it represents the latest stable version of the code. It is usually the branch that is pulled from a remote repository by default when a user clones the repository.