When creating a Facebook Group there are a few things that you need to know. Firstly, who do you want in your group? Secondly, do you know the purpose of your group? Thirdly, what are you looking to achieve from your group?
In order to have a successful group you need to keep these things in mind, for example, if your group is centred around solicitors, there would be no benefit of having a lot of tradesmen in the group because you won’t have a common ground to spark conversation or be able to generate any sales from it. You need to attract the relevant people, to make it successful.