There are several types of user testing and user research approaches or categories, each with . Expert Review – Use when you need to find and more basic usability and design issues in a proposed design. The output would be specific design problems and proposed resolutions. User Testing / Usability Testing – Use during an iterative design process to evaluate design concepts, prototypes, and completed interfaces to quickly discover design problems. User testing can be in-person and moderated, remote and moderated, or a more modern approach is . User Research – Is usually done at the beginning of a project with various techniques with the goal being a full understanding of user needs. You will discover the user’s full persona, their context of use, and their requirements. In today’s world, with the user experience design and the product designer working closely together in iterative design process, we see an explosion of user testing, with remote, unmoderated user testing being a top choice for fast results.