What happens in the prologue of Canterbury Tales?

The prologue introduces the narrator, Geoffrey Chaucer, and describes a group of pilgrims who have gathered at the Tabard Inn in Southwark, London, on their way to Canterbury Cathedral to visit the shrine of Saint Thomas Becket. Chaucer describes the physical appearance, social status, and personality of each pilgrim, providing a rich and diverse cast of characters. The prologue also establishes the framework for the tales to follow, as the pilgrims decide to tell stories to pass the time on their journey.