Srila Prabhupada explained how Radharani is the Ahladini potency of the Supreme Lord. Krsna does not enjoy alone and therefore to enjoy bliss, He expands as Srimati Radharani. So Radharani is not an ordinary woman. Krsna is the Parama Brahma, if He wants to enjoy, it would be on a transcendental level. Radharani is the source of all the gopis, all the queens of Dwaraka, and all the Laksmis in Vaikunta. She is the embodiment of all the good qualities. Krsna is Madana Mohana. He attracts even Cupid! But Radharani is Madana Mohana Mohini. She attracts even Krsna! 

Excerpt from a talk given by HH Jayapataka Swami Maharaja on 6th september 2019 at Sridham Mayapur