Moderated VS Unmoderated Tests in UX Design

Usability tests in online UX Design Education come in two broad categories: moderated and unmoderated.
A moderated UI usability test is when the researcher or you, as a designer, work with the user, either in the same space or online, to take them through the prototype. You ask the questions while the user completes the tasks answers the questions.
In an unmoderated test, the users work by themselves. There is no one there in the room, or in the virtual room, to help them, prompt them, or ask the question in a different way. This really tests the UI design. So, unmoderated tests can be challenging for users, but, equally, can give you really good insight into where those UX challenges are. If the users are struggling to complete the test, then that is a clear indication that something with your solution isn’t quite right, and may need some extra attention.