Mastermind groups have historically existed in the business world, but they’re becoming more popular in other spheres as well. If you have started or are planning to start your own mastermind group, you may be wondering how to promote it. But first, let’s take a look at what exactly this group is and what it does. A mastermind group, also known as an advisory board or peer advisory board, consists of several people with similar skills and goals who meet regularly in order to share advice and support each other with their projects and businesses.