It shows the current level of happiness (-2) and how it will change on the next tick (each 3 min) (-2.4). The Happiness which is shared between the towns owned by Rome only and in the province of Italia only.
The information related to all the other towns of the Province (of Italia in our example): Note that you may open/close it automatically with the Escape Key. When clicking on a Town or City, this panel opens.
