There are many common UX design principles, but some of the most important ones are usability, learnability, and engagement.
Usability is all about making sure that your product is easy to use. That means having a clear and intuitive interface that users can understand and navigate easily. It also means providing the users with all the information they need to use your product effectively.
Learnability is all about making sure that your product is easy to learn. That means having a consistent and logical interface that users can understand quickly. It also means providing users with enough information to understand how to use your product, without overwhelming them.
Engagement is all about making sure that your product is interesting and engaging to use. That means having a compelling and engaging interface that users will want to use again and again. It also means providing users with enough information and features to keep them coming back.