This document discusses genre theory and the concept of genre. It provides definitions of genre from various theorists like Warren Buckland who describes genre as categorizing films into groups based on their type. The document discusses how genre helps audiences and industries classify works and influences what is produced. It also notes that while genres provide structure and familiarity, deviations can confuse or please audiences. Several genre theorists are quoted discussing topics like genres borrowing conventions, genres being defined by repeated codes and conventions, and genres changing over time and contexts.