Film classification aims to regulate content appropriately for different age groups and protect viewers from potentially offensive material. Films are rated on a scale from U to 18 to provide guidance on appropriate age levels and insight into the nature of the content. Lower ratings like U and PG are meant for general audiences and younger children, while 12, 15, and 18 ratings have increasing restrictions and content warnings due to depictions of violence, language, sex or other potentially disturbing material unsuitable for younger age groups.