The Gospel is the greatest message of all time.
Man is broken and sinful. We naturally rebel against the glorious God who created us and knows what is best for us. We think that we understand how to manage our lives better than He does. God didn’t want us to be destroyed in this. Therefore, God sent his Son as a man named Jesus and allowed him to be nailed to a cross so that sin, death, and the wrath of God could be placed on to him as a legal transaction. When he died, it all died with him. Three days later, he rose from the dead and established his kingdom. Now, Jesus is the King and Lord of all.
All who respond to this in repentance and belief that leads to following Jesus above everything will receive forgiveness of sin and will be adopted into God’s family. In him, we have grace lavished upon us.