Engaged customers are the holy grail for any business. They buy more. They defect less. They spread the word for you. But research shows that just a small level of dissatisfaction results in a much bigger hit to engagement. Which means it’s time to take a look at how you’re serving and communicating with your most devoted customers or clients. What’s their experience like? What’s something extra you can do for them this month? Don’t let a small hit erode a valuable relationship.