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The document discusses the importance of usability in design. It notes that usability matters and is an important consideration. The document outlines some basic principles of user experience design like giving users only what they need, knowing the target user's psyche, designing for usability like one's mother could use it, using data and stats about users, guiding the eye to the focal point, using color and type effectively, prioritizing the human experience, and designing to simplify things for users. The overall message is that usability should be a core part of any design process in order to create positive user experiences.Read less