Using abbreviations makes the message shorter.

He is studying the history of looting.

They looted the enemy's village.

Their village became a target of pillage by the enemy.

They pillaged the enemy's village.

He had hidden the booty he had obtained from his life as a pirate.

Please explain the outline of this project.

This book explains the outline of Japanese history in detail.

Dear Sir/Madam, I pray for your health and happiness.

Please understand the plan by looking at this rough sketch.