Facebook groups are small, private online communities where people with shared interests join together to discuss relevant topics. Unlike Facebook pages, which are official representatives of causes, brands, businesses and companies, Facebook groups are informal communities with up to 500 members centering around common interests. A group’s Wall posts act like a default message board, where members can post their own discussion topics pertinent to the group. Other members then leave comments on the topic and join in the discussion. If you’re a member of a Facebook group, you can easily create your own topics. Tips Warnings Writer Bio