Users usually use questionnaires for feedback. Whether the feedback collected is good or not mainly depends on whether the questionnaire design is comprehensive. As for the authenticity of the questionnaire, you can set some logical questions or ask the same questions repeatedly. For example:

Set the logical relationship: the second question asks whether you are satisfied with the product design (agree, generally disagree very much), and the ninth question asks whether you are dissatisfied with the product design. If the questionnaires with logical errors are screened out, the reliability of questionnaire results analysis can be improved to some extent. Or set the ninth question mentioned above and answer it in the opposite direction.

Set duplicate questions: As in the above example, two identical questions will appear every few questions, and those with inconsistent answers will be filtered out.

Generally, questionnaire collection includes online questionnaire, offline questionnaire or a combination of both. For example, online questionnaires can be used to export QR codes or links to customers to fill in. In order to make users happy to fill in, you can set up a lottery or a small gift, or if the enterprise or unit has an information department, you can also ask them to write a web page to collect questionnaires, mainly depending on what you do. If users often use your official website, please ask the information department to write a webpage or directly implant a link or QR code into the webpage.