In general, there's not much here and it's mostly just a gateway to the other tabs. Here you can see some of the latest games you played, your driver version, whether AMD Link is connected or not, and some ads and tutorials.
To start off with, here's a brief summary of each of these tabs. Radeon Software is organized into five distinct sections: the Home tab, the Gaming tab, the Record & Stream tab (if you have supported hardware), the Performance tab, and a general settings section (symbolized by the gear icon near the top right corner) and these are generally divided into other subsections.