If you have a small business your focus is certainly directed to creating more revenue. There are many approaches that can help you achieve your goal; marketing, special offers, events and the like. But look at how both new and existing customers are retained and given incentives to spend more money, then there is nothing that beats a loyalty system in an app. Your existing customers are the easiest to influence, because they already have a sense of belonging to your business, and a loyalty program gives them a motivation to pump even more revenue in to your business.