First of all, as already mentioned, you have to carry out regular surveys. Without communicating with your customers, you cannot know what they expect from you and your services. You then work out which steps to take next from the results. Customers often show their dissatisfaction when contacting the company, for example, via the support hotline or during sales talks in the store. Here employee training courses help to strike the right note, even in difficult situations. Establishing an effective complaints management system also helps to increase customer satisfaction.
Incidentally, in marketing research, it is often debated whether it makes more sense to merely fulfil expectations or even exceed them. Getting the most out of your product in order to satisfy the customers’ wishes that they didn't even know they had sounds like a great competitive advantage. However, you have to ask yourself if the extra effort and cost is worth it. In order to exceed expectations, additional effort is necessary, but this might not make sense if the result ends up being only slightly better than the simply just fulfilling expectations.
Expectations also arise in part from your own promises. If you advertise a certain service and cannot (always) deliver it, customer satisfaction will decrease. This means either that you have to adapt your service promise or that you have to put more energy into the process in order to meet the expectations you generated yourself.
Ultimately, however, you improve customer satisfaction by improving the quality of your products and services. If you take the needs of your customers into account, you can count on long-term success.