A set of questions about a topic that’s used for research purposes. Questionnaires are commonly used in digital marketing to get feedback on user experience (UX). For example, you might send one after a customer makes a purchase to find out if they experienced any confusion during the checkout process. Marketers also commonly use questionnaires after someone unsubscribes from a newsletter or other mailing list.

Building an Opt-In List, Building Relationships
If you aim for success, you must do everything within your means to achieve that. You just donít go on sitting there in your house complaining about not getting as much profit as you expect.