The main purpose of a survey is to collect and gather information. Survey is a means of gathering information and gaining an insight in a specific situation or problem. There are a few different types of surveys, such as conducting telephonic interviews, asking face-to-face questions, emailing the surveys or conducting random interviews with people walking along the road. The list does not end here. There are many more ways in which a survey can be conducted.
What are 3 examples of a survey, and for what potential purpose could each be used?