"The tree is like the basic story outline for your novel. You know it has to have certain aspects to be a novel - character, plot, setting and so forth. You have an idea for your novel, but you don't have all the details yet. A rough outline will help you visualize the novel before you start."
The link is a nice discussion of
trees and writing.
Feel free to be the first
Please review the linked page for context.
If you can think of something better than this,
please add it to the database