A survey is a data collection tool used to gather information about individuals.  An online survey is the same thing, but because of their easy accessibility, they are the most commonly used of the two. Over the past couple of years, survey sites have become an increasingly popular way to make money - for both companies and consumers. Companies like to use online surveys to acquire a better understanding of people's likes and dislikes. With this information, they can revise their products to reach their highest selling potential. Ultimately, your participation in these types of offers not only helps you out financially, but it gives the company the statistical information they need to enhance their products.