Our decisions and our actions are predicated based on an underlying motivation, whether we know it or not.
Most of the things that we do, we do it for our own self-interest, such as whether to procrastinate or do work, whether to exercise or eat fast-food. However, there are some decisions that we make that are influenced by the environment, for example, advertisements.
Thus, I think that it is important to be aware of such motivations that influence our decisions. Doing so will allow us to recognise the bad motivations from the good and override them when needed.
It prevents us from carrying out decisions that may not really be for our own self-interests or decisions that will be harmful to other people.