When Gabriel came with the verse: “READ in the name of your Lord“. the blessed call (Da’wa) to Islam then started.
Muhammad was a Messenger, a Prophet and a leader (Imam).
Since Prophet Muhammad was the imam or leader. He followed the proper ways to attain the goal of calling to Islam.
In the beginning, it was preferable to call people to Islam in secret.
This was to help the Prophet, peace and blessings be upon him, in odder to lay the foundation for all that is needed for his call.
It was also to teach Muslims the importance of taking precautions and exerting all possible means during the strife for the spread the blessed call to Islam.
Recite in the name of your Lord