This alerts shows every time that a tasks stars or ends. It indicate the tasks that is affected and a you can make a Left-Click over the text or the bottom-left icon to see the log event.
When the program is closed, basically it's minimize itself and a SQLServerBooster's logo appears on the Taskbar.
Doing a Righ-click over the SQLServerBooster's logo try icon this Context Menu appears. It is possible to "Open the User Interface", "Exit", "Donate" or "About".