Following their decision at the Jerusalem Council, the godly men pen a letter explaining their decision to the Gentile Church in Antioch. The letter encourages the Gentile believers and explains to them the requirements asked of them to not offend their Jewish brothers. In addition, Judas and Silas are sent as "tradents" to explain the letter and provide additional strengthening and encouragement to the Antioch church.
[Act 15:22-35 NASB] 22 Then it seemed good to the apostles and the elders, with the whole church, to choose men from among them to send to Antioch with Paul and Barnabas--Judas called Barsabbas, and Silas, leading men among the brethren, 23 and they sent this letter by them, "The apostles and the brethren who are elders, to the brethren in Antioch and Syria and Cilicia who are from the Gentiles, greetings. 24 "Since we have heard that some of our number to whom we gave no instruction have disturbed you with [their] words, unsettling your souls, 25 it seemed good to us, having become of one mind, to select men to send to you with our beloved Barnabas and Paul, 26 men who have risked their lives for the name of our Lord Jesus Christ. 27 "Therefore we have sent Judas and Silas, who themselves will also report the same things by word [of mouth.] 28 "For it seemed good to the Holy Spirit and to us to lay upon you no greater burden than these essentials: 29 that you abstain from things sacrificed to idols and from blood and from things strangled and from fornication; if you keep yourselves free from such things, you will do well. Farewell." 30 So when they were sent away, they went down to Antioch; and having gathered the congregation together, they delivered the letter. 31 When they had read it, they rejoiced because of its encouragement. 32 Judas and Silas, also being prophets themselves, encouraged and strengthened the brethren with a lengthy message. 33 After they had spent time [there,] they were sent away from the brethren in peace to those who had sent them out. 34 [But it seemed good to Silas to remain there.] 35 But Paul and Barnabas stayed in Antioch, teaching and preaching with many others also, the word of the Lord.