Romans 3:24 — Being justified freely by His grace through the redemption that is in Christ Jesus.
Justification = legal and formal acquittal from guilt
Freely = no prior conditions, a gift
Redemption = buying back, deliverance
Verse 23 shows that God is just, now we see how we can be justified. Christ Jesus paid our redemption.
The sense is that God delights (grace) in saving.