What does conversion mean in Christianity?

In Christianity, conversion refers to the transformative process where an individual turns from sin and idols to embrace the true God through repentance and faith in Jesus Christ. This is succinctly captured in Acts 3:19, which calls for repentance and returning to God for the forgiveness of sins. The Thessalonians' conversion involved a clear turning away from pagan practices and idolatry to serve the living and true God, showcasing the power of God's grace in changing hearts. Conversion signifies a radical change in direction, reflecting a heart that has been opened by God, enabling a person to believe and follow Christ wholeheartedly.