Pope Francis developed this prayer years before he was pope. It's a mnemonic to remember who to pray for.
Thumb: those closest to you, including family and friends
Pointer finger: those who teach and mentor
Middle finger, the tallest finger: reminds us to pray for our leaders (my note: regardless of whether you voted for them or agree with them, pray for wisdom for them and for God's guidance)
Ring finger, the weakest finger: those in need, "the least and the lost"
Pinky, the smallest finger: yourself, humbly