UX (User Experience) Website Design is simply where the form and function of a website intersects. The goal is to have the largest cross section possible.
This is something that is very important. It is very important that your website looks appealing, but it is also extremely important that it has all of the information that a person might be looking for, laid out in a way that is very user friendly.
An example would be, a homepage should not be cluttered or so fancy, that it is hard for a user to navigate. It is important to keep in mind that users of ALL experience levels 1-10 using the internet.