Shradh is an important ritual as per the Hindu tradition. It is performed as a Puja to salvation aka atma shanti of departed ancestors (paternal as well as maternal). It is an act of tribute and respect, devotion towards ancestors. Appeasing the dearly departed souls and offering them respect before God’s presence helps enhance one’s well-being. It is especially helpful in nullifying the effects of Pitr dosh.
During Shradh, Pitra Kriya is highly significant. As per the Garud Purana, Matsya Purana, Vishnu Purana, Vayu Purana and other sacred scriptures as Manu Smriti etc. give an account or representation of Shradh.