Lord Caitanya is the sankirtana−yajna−purusa As, in previous ages, Lord Visnu appeared to accept Vedic yajna, in this age, Lord Caitanya has appeared to accept our sankirtana−yajna: In the Srimad−Bhagavatam it is clearly stated that in this age of Kali the only successful performance of yajna, or sacrifice, is yajnaih sankirtana−prayaih: the best type of sacrifice is simply to chant Hare Krsna, Hare Krsna, Krsna Krsna, Hare Hare/ Hare Rama, Hare Rama, Rama Rama, Hare Hare. This yajna is offered before the form of Lord Caitanya, as other yajnas are offered before the form of Lord Visnu. These recommendations are found in the Eleventh Canto of the Srimad−Bhagavatam. Moreover, this yajna performance confirms that Lord Caitanya Mahaprabhu is Visnu Himself. As Lord Visnu appeared at the Daksa−yajna long, long ago, Lord Caitanya has appeared in this age to accept our sankirtana−yajna.
¯Srimad−Bhagavatam 4.7.41
By performing sankirtana−yajna and satisfying the yajna−purusa, Lord Caitanya, one can derive all the results derived by great sacrifices in the past: Yajna means Lord Visnu, the Supreme Personality of Godhead, and sacrifice means working for the satisfaction of the Supreme Personality of Godhead. In this age, however, it is very difficult to find qualified brahmanas who can perform sacrifices as prescribed in the Vedas. Therefore it is recommended in Srimad−Bhagavatam (yajnaih sankirtana−prayaih) that by performing sankirtana−yajna and by satisfying the yajna−purusa, Lord Caitanya, one can derive all the results derived by great sacrifices in the past.
¯Srimad−Bhagavatam 4.19.7