Genre is useful to film producers, distributors/marketers, and audiences for several reasons:
Producers like genre because it helps them minimize risk and predict costs and revenues. Genre films are also often easier to write, fund, and market. Distributors/marketers find that genre makes films easier to target and advertise to specific audiences. Audiences enjoy genre films because they provide familiar conventions and expectations while still offering surprises. Genre allows audiences to categorize films and experience themes and resolutions to fears or issues.