Information hub window
The information hub is a central place that allows quick access to your important information bits in one screen. If you want to keep track of your nation's stats and it's budget as well as changes in regional owernship, this is the place to go.

[1] Strategic map
This is a 2D projection of the globe with the current regional posessions. Each nation has it's own distinct color, and you can toggle between the current and the last turn (with the button in the lower left of the map) to quickly check how the situation changed between the turns. It also displays your agents and divisions.

[2] Summary
Shows all important factors of your nation in one spot, like military strength, total population, growth, etc.

[3] National budget
You should check this on a regular basis during your game as it shows how much money you earn and how much money you spend each turn. If you're bleeding money and won't be able to buy or construct stuff then check this panel to see where your money is spent in order to optimize your spendings.

[4] Messages for this turn
This is the same as the message ticker in the game screen, and shows all important messages for this turn. Double click on a message to open up it's correpsonding window.