Genres are categories of films that share similar codes, conventions, and techniques. For example, social realist films like Imperial Dreams aim to capture realistic depictions of life. Genre expectations influence audience experiences - gangster films typically contain elements like car chases, guns, violence, and organized crime. Horror films aim to provoke fear and suspense through techniques like unexpected scenes, handheld camerawork, and unsettling music. Producers benefit from genres by having established formulas to follow that can guarantee popularity and help market their films to targeted audiences.