Description

Git generates a file named description which contains the name of the repository as set by the user. It is located at .git/description. It has a default value as an unnamed repository and the developers should place the actual project name and description in this file. It is used by Git as a default way to know the name of the repository.

It is used by GitWeb and is not considered by GitHub or GitLab.
GitWeb is a web interface for git projects. It can be used to generate a web application with search feature, RSS feed and many others. It can be seen as a native alternative to external services like GitHub.