Wahhabism is an ultra-conservative branch of Sunni Islam.

It is a form of Salafism, and a religious movement within Sunni Islam Wahhabism is developed by an eighteenth-century Muslim theologian, Muhammad ibn Abd al-Wahhab (1703–1792) from Najd, Saudi Arabia.

Ibn Abd Al-Wahhab advocates purging Islam of what he considers to be impurities and innovations.

His has become the dominant form of Islam in Saudi Arabia.

Its adherents prefer to be referred to as Salafis.The movement claims to adhere to the correct understanding of the general Islamic doctrine of Tawhid, on the "uniqueness" and "unity" of God, shared by the majority of Islamic sects, but uniquely interpreted by Ibn Abd Al-Wahhab.

Ibn Abd-al-Wahhab is influenced by the writings of Ibn Taymiyya and questions classical interpretations of Islam, claiming to rely on the Qur'an and the Hadith.

He attacks a "perceived moral decline and political weakness" in the Arabian Peninsula and condemns what he perceives as idolatry, the popular cult of saints, and shrine and tomb visitation. (Esposito, John (2003). The Oxford Dictionary of Islam. Oxford: Oxford University Press.)

The terms Wahhabi and Salafi and ahl al-hadith (people of hadith) are often used interchangeably, but Wahhabi has also been called a particular orientation within Salafism, an orientation some consider ultra-conservative and heretical.

Wahabb is an Islamic doctrine that is based on the historical alliance between the political and financial power represented by Ibn Saud and the religious authority represented by Abd Al-Wahhab; the doctrine continues to exist to this day thanks to this alliance, the financing of several religious channels and the formation of several sheikhs.