This document provides an overview of user experience (UX) design principles and processes. It begins with definitions of UX and UI, then outlines the typical UX design process of understanding user needs, prototyping, and testing designs. Key principles discussed include placing elements according to visual importance and proximity, limiting options to aid decision making, using implicit visual cues to guide users, and designing for readability and scannability. Gestalt principles of grouping and flow are also covered. The document aims to explain how understanding cognitive processes can help designers create more effective interfaces.