Customer Decision Making Process

The consumer decision making process is a method used by marketers to track the stages of a purchase from start to finish. This process may not apply for customers buying the weekly shop or small 'on a whim' purchases, but generally the more complex and expensive the product,  the more likely customers will go through a range of processes and considerations before finally making that purchase.  

More info: https://www.professionalacademy.com/blogs/marketing-theories-explaining-the-consumer-decision-making-process/