We have heard a lot about Customer Service, Customer Support, Customer Success. A sum total of all the interactions a customer goes through (proactive/reactive) forms the Customer Experience.
In the traditional form of business, the relationship ended once the customer purchased the product. However, in subscription economy the relationship begins post sales. Customer Experience begins from the moment customer browses the website, interacts with support team, signs up and starts using the product.
A strong product needs to be backed up by impeccable customer experience. For instance, online trainings to customers, sharing best practices, video tutorials, webinars can help educating customers and making them successful.