What are the key factors in satisfying customers?

Solving the client's problems and meeting the goals.

I think quality of the product and customer service is what everyone aims at.

Quality of the product - for first impression and Solving the client's problems - for retention users. These both very important. Because, even if you have a great and quality product, your customer may make incorrect actions or errors on the product, for example, he did not correctly indicate the data in the payment, and then he needs your help. The main thing to always remember is that what is obvious to you does not mean that it is obvious to the user.

Value! If your product doesn't bring any value to your customers they will never be satisfied, because without value satisfaction cannot exist. Also, they're not going to spend money on your product. Humans are very value driven. We rarely do anything that doesn't benefit us. If you're interested in coding emails please check out our launch, live right now (https://www.producthunt.com/post...) Kind of ironic, considering the last sentence 😁

The product should always provide business values instead of only technology

You just need to put the customer first. Solve his problems, respond to his requests as quickly as possible, create content that is useful for him.

Communicating with your customer on a regular interval is quite important. Setting up monthly catchups just to understand what and if they are facing any issues. Understanding how they are using the product and what features can bring the next set of values for them are a few things that have a great impact. Trying to focus a lot on the above aspect as we head toward our launch as nothing is more important then the feedback of your initial set of customers when you are launching your product.

interview them periodically

Truly understanding what problems customers are facing and resolving these problems.

To satisfy your customers, you should understand the customer behaviour. So, you can provide specific services to specific customer segments. For segmentation of customers there're many tools. You can check B2Metric Decision Intelligence , one of them and such a great tool for understanding customer behaviour.