This window is one of the most used windows in the system. All it does - shows you the list of articles, grouped by one of the set criterias. You can show the articles grouped by "Article list" (a system option when you create an article) or by tags. Either way let's you show the list of articles that you wish to show.
The display options of this window are very flexible.
There are many ways to show you article list, with or without picures, 1 or 4 columns in a raw - it is totally up to you!