In general terms, what was Paul's modus operandi? How, in other words, did Paul spread the gospel to gentiles?

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The Answer is After his conversion, Paul's missionary activity focused on the spread of the gospel to the gentiles. Paul traveled to cities without churches and preached about God, Jesus, and salvation. He stayed with the new church for some time and left only when he felt it was stable and able to sustain itself. After he left, though, Paul did not abandon these churchesHe reminded the community of his teachings, elaborated on issues of faith, and demanded certain ethical and moral behaviors.

In General Terms, What Was Paul's Modus Operandi? How, in Other