For example, we can use a decision tree to plan a trip from Vienna to Bratislava. 

Which branch allows us to get there and take the least amount of decisions?

Vienna -> BratislavaVienna -> Brno -> Bratislava

Exactly! This allows us to see which option has the fewest steps. This doesn't always mean it's the right decision though.

In this case, we want to get to the result and take the least number of decisions possible.