The terms UI and UX are often used interchangeably, but there is a big difference between the two. UI stands for User Interface and is the overall look and feel of the site. This includes the layout, colors, font, and images. UX stands for User Experience and is all about how the user interacts with the site. This includes the navigation, content, and overall flow of the site. Both UI and UX are important facets of web design, but they serve different purposes.