An Invitation by Pope Francis:
The Holy Father has invited all the faithful, of all the world, to pray the Holy Rosary every day, during the entire Marian month of October (in honour of the Blessed Virgin Mary), and thus to join in communion and in penitence, as the people of God, in asking the Holy Mother of God and Saint Michael Archangel to protect the Church from the devil, who always seeks to separate us from God and from each other.
The Holy Father has also asked that the recitation of the Holy Rosary during the month of October conclude with the prayer written by Leo XIII:
“Saint Michael Archangel, defend us in battle, be our protection against the wickedness and snares of the devil; may God rebuke him, we humbly pray; and do thou, O Prince of the heavenly host, by the power of God, cast into hell Satan and all the evil spirits who prowl through the world seeking the ruin of souls. Amen.”
Click on the link below for a guide on how to pray the Holy Rosary:
click: How to Pray the Holy Rosary