Tablighi Jamaat is a transnational Deobandi Islamic missionary movement that focuses on exhorting Muslims to be more religiously observant and encouraging fellow members to return to practising their religion as per the Islamic prophet Muhammad, and secondarily give dawah (calling) to non-Muslims. "One of the most widespread Sunni" islah (reform) and daʿwa (missionary) organizations "in the world today", and called "one of the most influential religious movements in 20th-century Islam," the organisation is estimated to have between 12 and 80 million adherents worldwide, in over 150 countries, with the majority living in South Asia.