The Chaplet of Divine Mercy is a truly special and holy prayer because it was created by Jesus for mankind. The main purpose of the Chaplet of Divine Mercy is to save dying sinners.
Jesus revealed to St Faustina that praying the Chaplet of Divine Mercy for a dying soul appeases the Just Anger of God. Our sins rightly deserve to be punished but God has chosen to give us a prayer which will prevent Him from punishing us and ask Him to forgive us and to heal us. Through this prayer, we can obtain mercy for ourselves, our family and friends, our communities, our country and even the whole world.
Jesus attached extraordinary promises to its recitation.
Encourage souls to say the Chaplet which I have given you (1541). Whoever will recite it will receive great mercy at the hour of death (687). When they say this Chaplet in the presence of the dying, I will stand between My Father and the dying person, not as the just Judge but as the Merciful Savior (1541). Priests will recommend it to sinners as their last hope of salvation. Even if there were a sinner most hardened, if he were to recite this Chaplet only once, he would receive grace from My infinite mercy (687). I desire to grant unimaginable graces to those souls who trust in My mercy (687). Through the Chaplet you will obtain everything, if what you ask for is compatible with My will. (1731)
Prayed on ordinary rosary beads, The Chaplet of The Divine Mercy is an intercessory prayer that extends the offering of the Eucharist, so it is especially appropriate to use it after having received Holy Communion at Holy Mass