Currently, it is not necessary to move from one place to another, go from house to house to complete your questionnaire, because by creating it online, you will be able to get a large number of answers at a lower cost. In contrast, with traditional research, the cost of production was a barrier to obtaining the right sample for the research process.
Another difference between the online questionnaire and the paper questionnaire is anonymity. People feel more free to respond, which translates into honest answers and in greater detail.
Finally, the application and analysis of online questionnaires allows you to have responses in real time and carry out analyzes in the shortest possible time. Unlike traditional research that requires a lot of time to collect and tabulate data.
I recommend that you read this article about amazon quiz answers.