No descriptions/explanations for some bullets in the Overview

[CAM-Gerlach]

Issue Description

Many bullets in the Overview, as well as some sections/headers elsewhere, have no description at all. Therefore, we want to have at least a basic explanation of each before we release the docs publicly, as this is fairly low hanging fruit and will have a pretty high impact to effort ratio.

Where is the relevant portion of the documentation located?

Primarily the Overview, but content should be opportunistically added elsewhere when desperately needed and easy to do.

What would you suggest it be replaced with?

At least a few sentences/a short paragraph of explanation for each, as appropriate.