Natural behavior
Not being in a lab will already allow the participants to feel less inhibited and under observation, but remote unmoderated studies allow the participants to act completely natural. Imagine a music-streaming app. Ideally, the participants should use the app where and when they would naturally use it. This may be while working out or riding a bike, or even doing household chores. Participants might feel inhibited to work out or dance while being observed by a UX researcher. An unmoderated study has both the benefit that the participants can complete the study at their own convenience using the product as naturally as possible while also enabling the UX researcher to gather valuable feedback regarding the use of the app under real conditions. This is the biggest benefit of the remote unmoderated usability study.