temporal punishment, purgatory, and plenary indulgence

https://www.detroitcatholic.com/news/how-catholics-can-receive-a-plenary-indulgence-on-fridays-during-lent?fbclid=IwAR0g-UqF0B3wboFoY2Eh-VpXGfYBzVTWVLFp1azFwrEIlQ-W9B3wn6G7Gc4

 If one dies in a state of grace after receiving sacramental confession and absolution, but before having offered fitting penance, the Church teaches, that soul will undergo purification before entering heaven — a doctrine commonly known as purgatory.

“All who die in God's grace and friendship, but still imperfectly purified, are indeed assured of their eternal salvation; but after death they undergo purification, so as to achieve the holiness necessary to enter the joy of heaven,” the Catechism of the Catholic Church states in paragraph 1030.

An indulgence, meanwhile, is a special grace offered by the Church that either partially or fully remits this “temporal punishment.”