Акіда refers to the fundamental beliefs and doctrines in Islam that define a Muslim's faith. It encompasses the core tenets, including the belief in Allah, the prophets, the holy books, angels, the Day of Judgment, and divine predestination. Understanding акіда is essential for practicing Islam, as it shapes a believer's worldview and moral framework. The study of акіда is often divided into two main categories: aqidah of the Ahl al-Sunnah (Sunni) and aqidah of the Shia. Each group has its interpretations and beliefs, but both emphasize the importance of faith in Allah and adherence to the teachings of the Prophet Muhammad.