This is where you get an overview of your installed repositories.
This view is split into sections, one for each category you have installed a repository for, and at the top you will quickly see repositories that have a pending update (if any)
You will see a status icon that indicates the status of the repository. The color of that icon is customizable with themes, but the default is:
|Red||Restart pending, or not loaded.|
If you hover over the icon you will also see a short description.