Why does mrs bennet go into such detail about whom mr bingley danced with?

Austen begins developing Mrs. Bennet's character during the long description of who Mr. Bingley danced with. This dialogue teaches the reader many things about Mrs. Bennet. Mrs. Bennet does not recognize her husband's lack of interest and it becomes obvious that Mrs. Bennet only thinks about herself. She also shows her prejudices about the other ladies in the village, especially compared to her praise for her own children.