On the Solemnity of the Immaculate Conception (yesterday), Pope Francis literally opened the Year of Mercy.
The Year of Mercy is all about mercy.
Before you say "thanks Captain Obvious," think about what mercy really is. Mercy is God in action. It's the love of God turned towards you and me, and every other sinner.
To really understand mercy, and what the Year of Mercy is all about, you can't do better than Bishop Barron.