You should be confused with the previous sentence because it doesn't mean anything! But if you find yourself saying "what" every time you don’t understand something, you might be surprised to learn that it can be a little rude or impolite!
SO today I'm going to give you some better, more natural ways to express that you didn't understand, and ask someone to repeat something!
There are a variety of different ways to express you didn't understand depending on whether you are face to face, talking over the phone, being formal or informal...so make sure you watch the whole video to find out which phrases are used for which situations!