The veneration of the dead, including one's ancestors, is based on love and respect for the deceased. In some cultures, it is related to beliefs that the dead have a continued existence, and may possess the ability to influence the fortune of the living. Some groups venerate their direct, familial ancestors; some faith communities, in particular the Catholic Church, venerate saints as intercessors with God, as well as praying for and to departed souls in Purgatory.

In Europe, Asia, and Oceania, and in some African and Afro-Diasporic cultures, the goal of ancestorveneration is to ensure the ancestors' continued well-being and positive disposition towards the living, and sometimes to ask for special favours or assistance. The social or non-religious function of ancestor veneration is to cultivate kinship values, such as filial piety, family loyalty, and continuity of the family lineage. Ancestor veneration occurs in societies with every degree of social, political, and technological complexity, and it remains an important component of various religious practices in modern times.