Road Skippers communities are the place for people who are part of the same organization (e.g. company they work for), use the same service (e.g. insurance, ride sharing) or have common interest ( e.g. improve mobility in their town).
A good example of a community is a community managed by your car insurance company who decides to use Road Skippers to reward its policyholders for good driving behaviour. If you join such a community you will have access to premium campaigns and rewards.