A masterclass is a long interactive monthly session where experts teach or share how to get specific results. An expert facilitator such as a business mentor, business expert and entrepreneur typically leads a workshop that will navigate you through specific interactive activities in a collaborative environment such as business networking events.
It's a great way to learn or teach something specific. It can be an hour or a few hours long. It can also be a one-time thing or a series depending on what you want to learn or teach.