Maslahah refers to public interest or general benefit in Islamic law. It is a method used by Muslim jurists to derive rulings on issues not explicitly addressed in the Quran or hadith. There are different types and classifications of maslahah. While some jurists like Malikis and Hanbalis approve of maslahah if certain conditions are met, others like Shafi'is are more restrictive in its application. Historically, maslahah was used by early Muslim leaders and caliphs to address new issues and it continues to be applied in modern contexts involving areas like banking, family law, and medicine when no clear religious text provides guidance.