Gen-la Kunsang (National Spiritual Director of Switzerland, Italy & Austria and Resident Teacher at KMC Edimburgh) introduced Prajnaparamita in a recent podcast:

“Great Mother Prajnaparamita is a female Buddha who is the manifestation of Buddha’s perfection of wisdom. Or we can say she is the heart of Buddha Shakyamuni. Therefore we visualize her in the heart of Buddha Shakyamuni. So she is Buddha’s perfection of wisdom — or we can say direct realization of Emptiness, or manifestation of this realization of Buddha’s mind. …”

Gen-la Kelsang Kunsang