4 Now those who were scattered went about preaching the word. 5 Philip went down to the city of Samaria and proclaimed to them the Christ. 6 And the crowds with one accord paid attention to what was being said by Philip when they heard him and saw the signs that he did. 7 For unclean spirits, crying out with a loud voice, came out of many who had them, and many who were paralyzed or lame were healed. 8 So there was much joy in that city. (Acts 8:4-6)
Jews thought of the Samaritan people as heretics who did not keep the Jewish dharma ( chos byas ) correctly. However Yeshu had said that the good news would be preached first to the Jews and then to the Samaritans (Chapter 1 verse 8). The time for them to hear had now come.
Philip, along with Stephen, was one of the seven who had been appointed as servants to the young church (Chapter 6 verse 5). He was also an evangelist, which is how a preacher of the gospel is termed.