How people feel about your products, services, and business as a whole can impact your sales. If you're building expectations and now following through on promises, your customers will stop trusting you, which can affect sales and your reputation.
Of course, developing trust is important for attracting customers, not just retaining them. If you want to make a first sale, potential customers must trust that your business will do everything it says it will. For example, if you're selling products online, your products must arrive to customers in good condition and be of the same quality listed on your website. Meanwhile, if you're a service business, your services must deliver on promises it makes to customers about how you can help them.
Ultimately, if you want to earn more customers, you need to get them to trust you. Unfortunately, developing brand trust isn't as easy as making promises. You need a good strategy for helping new and old customers trust your business to promote more sales and help you generate revenue.