Genre theory aims to categorize texts into types based on common elements. A genre is a category or type of text. Genres are recognized through the repeated use of codes and conventions that audiences associate with that type of text. While genres were once seen as fixed forms, contemporary theory emphasizes that both the forms and functions of genres are dynamic and change over time based on societal and cultural changes. One weakness of genre theory is that it may reduce creativity by forcing works to strictly follow conventions of a genre.