This is where the GM's house rules will be as well as any decisions and GM calls. To maintain consistency.

The background of the area and recent local history.

Maps and other relevant images of the local area.

This is where all out of character chat goes.

This is where all in-character speak goes.

A place to store all pertinent information (ie- upcoming quests, current quests, completed quests, treasure to be divvied, etc...)