Microsoft Apps is an application that contains all the Android programs from Microsoft. Here they are sorted by categories (productivity, training, entertainment, communication, news), and have a detailed description with screenshots. Search is available, and there is also a category with the most popular applications. If you have already installed any Microsoft programs on your Android device, Microsoft Apps will recognize them immediately and will no longer offer to install them. In General, Microsoft has decided to release a directory inside the directory so that you can find even more applications, nothing unusual.
It is worth noting that within Microsoft Apps there are also not only applications developed by Microsoft, but also those programs whose developers have been absorbed by the software giant, for example — Wunderlist.