Main Points (who else but by courtesy of Tanya B?)
The Pyramid of Abstraction: with a foundation of concrete language, you can add things more abstract and still hold the reader in the scene.
Concreteness and brevity fight each other. Adding concreteness usually adds words.
Your goal is to come up with a few words of description that sets tone, says something about how the character sees it, is concrete and maybe even explains the setting.
Precision moves abstract words towards concreteness.