Exploration

Exploration points are generated from: The exploration points are spent for the upkeep of the visible territory. If your country generates less Exploration than it is required to support visibility, the visibility decay will start and some distant hexes will return to the fog of war.
 * "We want to see how the world looks like" population idea;
 * Scouts camp terrain building;

If you generate more Exploration points, you'll be able to plan your Exploration strategy.