It’s the twelth Purana. It contains four parts- Brahma khand, Prakriti khand, Ganesh khand and Shri Krishna Janma khand.
Brahma Vaivarta Purana
Brahma khand: Creation of the universe. Origin of Narayana from the body of Shri Krishna. Origin of Radha in Rasamandal. Origin of Gopas, Gopis and cows from the bodies of Radha and Krishna. Creation of all other animate-inanimate world.
Prakriti khand: Greatness of Durga, Radha, Lakshmi, Saraswati and Savitri in the creation of the world. Tales of Savitri-Satyavaan, Surabhi, Swaha and Swadha. Description of the clan of Surath. Tale of Ganga. Tales from Ramayana. Curse of Durvasa on Indra. Worship of Lakshmi.
Ganesh khand: Mainly discusses about the greatness of Lord Ganesh. Also contains tales of Jamadagni, Karteveerya, Parashurama etc.
Shri Krishna khand: Describes the life and plays of Lord Shri Krishna, under the heads of Braj leela, Mathura leela, reunion of Radha and Krishna. Migration of the residents of Gokul to Gokula.