What is a primary function of the Git version control system?

The primary function of the Git version control system is to monitor and manage software changes. Git enables developers to track modifications to files over time, allowing them to understand the history of changes, collaborate with others, and roll back to previous versions if necessary. This tracking of changes is crucial in software development, as it facilitates efficient management of different versions of code, enables branching and merging for collaborative work, and aids in maintaining a clear record of project evolution.

The other options do not encompass Git's core functionalities. A graphical user interface for coding is not a characteristic of Git itself, but rather relates to development environments or tools that may utilize Git. Publishing web content pertains more to web development frameworks and hosting solutions than to version control. Finally, creating user stories and requirements is a function related to project management and agile methodologies, rather than version control. Thus, the chosen answer accurately reflects the essence of Git.