Sunnism is a branch of Islam that follows the teachings of the Sunni tradition. It is one of the two major branches of Islam, the other being Shi'a Islam. The term 'SECT' is used to refer to a subgroup within a larger religious group, and in this case it refers to Sunnism. Sunnism is the largest branch of Islam, with over 1 billion adherents worldwide. It is based on the teachings of the Quran and the Hadith, and emphasizes the importance of following the Sunnah, or the example of the Prophet Muhammad.