What does 2 Samuel 24:17 mean?

When David saw the angel striking the people, he said to the Lord, 'I’m the one who sinned and did wrong. These people are just sheep. What have they done? Please, let your anger fall on me and my family.' 2 Samuel 24:17 - Modern Text Bible

(David takes responsibility, pleading for his people and asking God to punish him instead. This shows his heart as a leader.)