The aggregate of individual attitudes on political issues constitutes public opinion. It is measured through surveys, inferred from elections and protests, and continuously shaped by media, events, and elite cues.

Democratic governments claim to respond to public opinion, yet the relationship is complex. Opinion can be uninformed, unstable, or internally contradictory. Politicians both follow and lead it. Interest groups and media organizations compete to define what “the public” thinks. Polling methodology—sampling, question wording, timing—affects the reliability of reported results.

Some issues show stable majorities over decades; others swing with economic conditions or dramatic events. Public opinion constrains extreme policy options even when it does not dictate precise choices. Understanding its formation and measurement is essential for anyone seeking to explain or influence political outcomes.

A well-designed poll can reveal preferences that election results alone leave ambiguous.