Krishna’s dance of passion where a transcendental state of being is achieved through dance and music. Raas Leela is a major part of Krishna bhakti, where leela is about the union of a pure being with the Purushottam(supreme one).
When the one transcends the boundary of gender of the mortal body and immerses all the senses in transcendental love for the lord, it culminates in the union with the divine. When all the desires melt away in the fire of bhakti love , the true knowledge extinguishes ignorance within. This is the first step towards Raas Leela.