User experience (UX):

Explores the experience people have using a site, app, or tool to ensure it’s easy to use and not confusing.

User interface (UI):

Involves how people navigate through a site, app, or tool, using elements such as buttons, menus, color, and images.

Interaction design:

Focuses on how people are involved with the experience of the product, for example, a progress bar that shows where you are while signing up for a site or an icon that changes color to signal you’ve turned on a setting.

Information architecture (IA):

Involves creating the blueprint for a website by making sure it’s organized in an understandable way. Information architects come from a variety of backgrounds, including design, writing, library science, and psychology.

Skills: Photoshop, Illustrator, Dreamweaver, CSS, HTML, wireframing, prototyping