To help users understand why they should participate in the survey, include an introduction that explains the survey’s goals and how you’ll use the information. The introduction will provide context for the questions and serve as a brief explanation of user experience (UX) research, which may be new to some respondents.
It’s also helpful to provide an overview of the topics you’ll address or give a short description of each section. That way, users will know what to expect from the survey and be more prepared to answer the questions.