Pithru Santhi Homam
To live and die on earth is considered as divine, even by gods. That is why, supreme gods are taking incarnations on earth. But one atma gets the life of human being only after life of many other creatures. Only in the life of human being, one can do 'karma'. Only human being can decide what should be done. So, during the life of human being, one can do good deeds and attain salvation or moksha.
But some atmas are not able to perform their karma or fulfill their desires during their life of human being because of reasons like early death, accidental deaths, suicides, etc. So those atmas are not getting salvation. These atmas will cause evil effects in families. What these atmas could not perform on earth during their life time should be completed by their relatives, sons, daughters, etc. The good deeds or desires of the atmas should be done or fulfilled by their family members. The family will get prosperity through this. Pithrupooja is performed for this purpose.
Through pithrupooja, salvation or moksha is attained for atmas of 7 generation. The family will get its due blessings.