Daʿwah theory
Daʿwah (Arabic: دعوة, Arabic: [ˈdæʕwæ], “invitation”, also spelt dâvah, daawa, Dawah, daawah or dakwah) is the act of inviting people to Islam. The plural is daʿwāt (دَعْوات) or daʿawāt (دَعَوات). Preachers who engage in dawah are known as da’i.