Whether you are selling flowers or spa services, your customers need a way to reach you. Having a messaging (or help desk) feature within your app can really make a difference in the way you communicate with your customers. Think about it: OpenTable, for example, built its entire business model around this principle. Instead of calling a restaurant for a table, you can book it with less than five clicks on their platform. Now think about it: How many customers would prefer to communicate with you via text than via phone?