Customer research is important to understand customers and make good decisions. There are two types of questions in research - what questions that ask about facts and behaviors, and why questions that provide context and insights into feelings. Surveys are best for what questions, while focus groups, interviews, and observation help answer why questions. The key steps in research are to define the goal, identify the target audience, select the appropriate methodology like surveys for what questions or interviews for why questions, and detail the questions to be answered.