Vishnu yagya as the name suggests is the yagya performed to invoke the blessings of Lord Vishnu- who is the preserver of the universe and upholds Dharma (cosmic law).
This Yagya is performed by recitation of the one thousand names of Lord Vishnu for twelve hundred and fifty times. Hanceforth the processes followed are -- Dashaansh havan (the one-tenth part), Maarjan, Tarpan and last is Brahmabhojan (serving food to the Branmanas)
Benefits of Vishnu Yag (Yagya)
Vishnu Yag helps to get rid of “pitra dosh”, a condition found in some horoscopes and also helps to attain name and fame.
It benefits the person in finances as well.