You are eating. The phone rings. You answer and... surprise! You are on the line with a survey company. The classical scenario. Even if we don't like these firms, they are a painful necessity. A survey can even be very payful for a company. They get to know the public opinion in connection to a certain product and they adjust the necessary modifications.
The application of survey's known by the public is without a fact the opinion survey. It's mainly a survey institute who are doing surveys on the most popular ones. The USA company's were the first to use this type of survey's to get to know the consumer expectation and then raise their markets. Today the use of survey is commonly uses by company's. Their utility is still an interrogation mark. Nothing proves that results from a survey are right. If it's not reliable is it really worth to put efforts in this? Why does a survey is not 100% reliable you ask? A person in a hurry can answer anything if she don't understand the question.
If some people don't like survey's, others are really at ease with that pratic. In fact, giving is opinion get you to feel appreciated. It can even be payful since some survey's are remunerated. Then it's a good thing to take couple of minutes of your time to answer some questions. The next time a survey calls you, before hanging up, think that if somebody ask you for your opinion, it means that somewhere she counts for something!