As a member of the UX design team you need to have a strong understanding of your customers/users and their specific goals and incentives. With this understanding of your user you can craft user personas to dig into to the what, why, and how.
What is a user persona?
A persona is a detailed description of the personal traits of 2-3 typical, mainstream users. To build on this let’s look at the wonderful definition of persona provided by UX Mag.
A persona represents a cluster of users who exhibit similar behavioral patterns in their purchasing decisions, use of technology or products, customer service preferences, lifestyle choices, and the like. Behaviors, attitudes, and motivations are common to a ‘type’ regardless of age, gender, education, and other typical demographics. In fact, personas vastly span demographics.”