In other words
View your work as a complete stranger would. What would that individual think about the art but more importantly, for this challenge, what does the art say about the person who made it. Yes YOU know yourself very well, that is why the challenge is to see what you do with fresh eyes so that you can understand or have a glimpse into what someone else sees/thinks. You then can use that as a way to grow artistically. Knowing how others see your work tells you if you are succeeding at your intention. It expands your thinking. comments like pretty and nice and I like those colors are great from supportive friends but for the most part they are meaningless and won’t help you grow or expand your vision.