What are A, B, and C grade movies?

A, B, and C grade movies are informal classifications used in Indian cinema based on content, budget, and target audience. A-grade movies are high-budget films with top actors, strong scripts, and wide theatrical releases. B-grade movies have moderate budgets, lesser-known actors, and often focus on niche or sensational themes. C-grade movies are low-budget productions, usually with poor production quality and often include adult or exploitative content aimed at limited audiences.