https://www.wpar.net/marketing-automation-guide/7-%d8%aa%d8%b3%d9%8a%d9%8a%d8%b1-%d9%88-%d8%ad%d9%81%d8%b8-%d8%a7%d9%84%d8%a8%d9%8a%d8%a7%d9%86%d8%a7%d8%aa-%d8%b9%d8%a8%d8%b1-%d8%a7%d9%84%d8%a7%d9%8a%d9%85%d9%8a%d9%84/