en_tn_condensed/php/01/12.md

brothers

Here this means fellow Christians, including both men and women.

what has happened to me

"what I suffered because I was put into prison for preaching about Jesus". Paul says that two things have happened because of "the progress of the gospel": many people inside and outside the palace have found out why he is in prison, and other Christians are no longer afraid to proclaim the good news.

has really served to advance the gospel

"has caused more people to hear the gospel"