Interesting for everybody, however, is a progress bar (at the top) showing how much memory is consumed at the moment. There is also a Perform GC button that allows to ask Java to speed up the removal of the not-anymore-used objects (GC stands for Garbage Collection). Try it and almost everytime you will see an increase of free memory.
Other than that, the panel shows messages as they are published by the panels in the shared propery channel (which is explained more in the Dasboard documentation for developers).