Customer opinions significantly influence a business's operations. They determine whether specific goods and services will bring the business a profit. Given the high importance of consumer behavior for the market, continuously monitoring their satisfaction is particularly crucial. The customer satisfaction survey – a reference point for decisions made by the economic entity – should cover a range of interaction levels between the parties to the transaction, starting from the first contact (e.g., by phone or via the website) and ending with reliable service after the transaction has been completed, as part of the so-called after-sales service (e.g., concerning a warranty).
It should be kept in mind that the best results in assessing customer satisfaction are achieved when several methods are used simultaneously.