The main way I use it is seeing what equity I have in particular spots. For example, villain with 35% steal on the button raises and I'm in the blinds with JTs how am I looking? What if I have QJo? QJs? KQo...etc. What if villain is stealing 40%, 50%, 60%, 25%? You can then form a general idea of what kinds of hands you're willing to continue with and in what manner versus different flavors of villain.
Or maybe I want to see how my hand fares versus a villains 3bet range. Same idea.
Also I like to use stove with my hand histories, going through spots and seeing what odds
I was laying villain or was being laid along with what equity I actually had, and what equity I had against his perceived range. Then I'll use that info to get a better feeling of what bet-sizing I'd like to employ in similar situations in the future.