That parameter name seems a bit like the Department of Redundancy Department. It lets us choose between three kinds of dimension behaviors: Continuous, Baseline and Ordinate. We are all pretty familiar with Continuous. I've spent time doing mechanical drafting (aka shop drawings) in the past and it wasn't uncommon to use some form of the other two types of dimensions. This is what the three of them look like together.
The Baseline dimension you see in the image is a single element, the entire collection of dimension lines you see. Each dimension line is offset from the others by the Dimension Line Snap Distance parameter's value.