User-Centered
Design

Design is based upon an explicit understanding of users, tasks, and environments; is driven and refined by user-centered evaluation; and addresses the whole user experience

Visual Design

Visual design is often referred to as visual communication design. The idea behind this concept, figuratively speaking, is to get the product's visual design speaks to the user with the goal of making the product easy to use.

Interaction Design

The practice of designing interactive digital products, environments, systems, and services. While interaction design has an interest in form, its main area of focus rests on behavior.