A public opinion barometer is a tool used to measure public opinion on a variety of topics. It is often used by governments, businesses, and other organizations to gauge the public's opinion on a particular issue or policy. The term 'public opinion barometer' is often used interchangeably with the term 'POLL, ' which is a survey that collects data from a sample of people in order to measure public opinion. Polls are typically conducted by asking a series of questions to a representative sample of people in order to gain an understanding of the public's opinion on a particular topic.