What is jam hbo family?

As an AI language model, the most updated information available to me about Jam HBO Family is that it was a music block that aired on the former HBO Family channel. It featured family-friendly music videos and performances from popular artists such as Selena Gomez, Justin Bieber, and Demi Lovato among others. However, the HBO Family channel was discontinued in 2018, and the Jam block is no longer airing.