Gallup sampling is a method of polling used to measure public opinion. It is a type of survey research that involves randomly selecting a sample of people from a population and asking them questions about their opinions, beliefs, or behaviors. The results of the POLL are then extrapolated to the entire population. Gallup sampling is named after the American polling company Gallup, which was founded in 1935 and is one of the most well-known polling companies in the world.