Hadiths are recorded sayings, actions, and approvals of the Prophet Muhammad. They serve as important sources of guidance for Muslims, complementing the Quran in understanding Islamic teachings and law. Each hadith is evaluated for authenticity based on its chain of transmission and content. There are two main categories of hadiths: Sahih, which are considered authentic, and Da'if, which are weak or unreliable. Scholars study these texts to derive lessons and rulings that help guide the daily lives of Muslims, influencing everything from personal conduct to legal matters.