The Consumer Decision Making Process. If you know Consumer Decision Making Process, you can help firms understand Consumer Behavior, and if you know Consumer Behavior you can help firms to make a plan.
Consumer Behavior is description of how consumers allocate incomes among different goods and services to maximize their well-being, so congratulations to watch this video. 

References:
Consumer Behavior. Fernando & YVonn Quijano (Slide)
Decision Making Process: How Consumers Make Buying Decision?.  https://www.youtube.com/watch?v=Rn5a03Xp0Kc
The Consumer Behavior and Consumer Decision Making Process. https://www.youtube.com/watch?v=65Vt9nmVYDM