I believe the answer is: Informative
For example, let say that you read a historical piece that depict the story of the fight between the allies and the axis power in world war II.
By reading piece from multiple viewpoint, you would receive a lot of information that you couldn't get from reading only the viewpoint of the allies. Which make you able to understand the point of view that the axis power has that make them think that they should initiate the war./
