When you decide to become a participant for paid survey companies, questions, particularly personal questions regarding information about you is asked. These questions are asked so that they can sort out your responses and surveys to answer based on your demographics and profile.
One of the questions asked is about your education level, if you are currently studying or not and what education level are you currently in or what did you finish. Your occupation or field of work as well as your salary is also asked.
Most people who have entered the field of paid surveys for the first time might find this too insignificant and unimportant to what they are going to do. Some may find it as an invasion of privacy and others would be curious as to why do providers have to ask these types of questions especially their field of work and annual income. Your employment information, although you may think it is completely irrelevant, is in fact important.
These types of information are very important to providers so that they can choose the right type of survey for you. The types or types of products and services that are likely to be used by you will be based on your field of work and your salary. Take for example the comparison between two employees who earn differently: a highly paid employee would likely purchase high quality and expensive products and services compared to those who are averagely paid.
Your specific field of work also matters due to some bias or competition. If you are working in advertising or marketing firm, you would likely answer a product of your company in a biased way while if it is a rival company's product, again your answers will be biased and dishonest since you support your product more.
Specifying the type of work that you do and your yearly income determines what types of surveys you are suited for. In addition to that, it determines what products and services you are most likely to use based on your salary requiring the providers to better organize the responses and results of the surveys.