The gospel means good news.
What is this good news? That God sent his Son into the world to save sinners.

Who is a sinner? Everyone who has rejected God and not loved Him with all their heart, soul and mind. The truth is that we have all sinned and fallen short of God’s perfect standard.

Why is this a problem? God is our creator and judge and He is absolutely holy and just. God cannot and will not turn a blind eye to sin, however good we feel we may be. Justice must prevail and sin must be punished.

The good news? God sent his only Son, that whoever believes in Him should not perish but have everlasting life (John 3:16). Jesus was without sin. He had no sinful thought, inclination, motive, word or deed. Though he was the only man to ever live who was not a sinner, he paid a sinners penalty; death, not for himself but for all who believe and trust him. Isaiah writing many years before Jesus was born puts it like this “All we like sheep have gone astray; We have turned, every one, to his own way; And the Lord has laid on Him (Jesus) the iniquity of us all.”
By repentance (being truly sorry for sin and turning from it) and faith (trusting) in Jesus, sinners like you and me can know forgiveness and have eternal life. This is a wonderful message! Our sins forgiven, a personal relationship with God who loves us and finally entry into heaven. Come and find the truth, and "the truth shall make you free"!