Explaining indulgences and practices Catholics can do during the month of November for the Poor Souls in Purgatory.
It is during November that the Church meditates on the Communion of Saints, which is the charitable link with the faithful who have already reached heaven (Church Triumphant), the faithful departed who are still expiating their sins in Purgatory (Church Suffering) and of the pilgrim faithful here on earth (Church Militant). "In this wonderful exchange, the holiness of one profits others, well beyond the harm that the sin of one could cause others. Thus recourse to the communion of saints lets the contrite sinner be more promptly and efficaciously purified of the punishments for sin." (Catechism of the Catholic Church, 1475).
On November 1st the Church celebrates the Solemnity of All Saints, a Holy Day of Obligation, honoring all those faithful in heaven. Throughout November the Church also remembers our Faithful Departed. The need and duty of prayer for the departed souls has been acknowledged by the Church at all times. It is recommended in the Scriptures of the Old Testament: "It is therefore a holy and wholesome thought to pray for the dead, that they may be loosed from sins."(2 Macch. 12, 46). This duty has found expression not only in public and private prayers but especially in the offering of the Holy Sacrifice of the Mass for the repose of souls.
Throughout November the Church prays for all who are in the purifying fires of Purgatory, waiting for the day when they will join the company of the saints in heaven. The celebration of Mass is the highest means the Church can provide for charity for the dead, but we can also relieve their sufferings through our prayers, sufferings and penances. We can also help the Poor Souls by doing acts and prayers that have indulgences attached to them. There are many indulgences, applicable only to the Souls in Purgatory, that can be obtained during the month of November.
The above is from Culture.Org and is continued here: Catholic Culture.Org - Praying for the Dead and Gaining Indulgences