This document discusses Lean UX basics and provides examples from a case study of redesigning an online complaint handling system for the Indonesian government. It advocates for an iterative UX design process of building an MVP first, then measuring user feedback and learning from it to continually improve the design, rather than trying to design a perfect product up front. The case study highlights issues found with the original system such as high bounce rates, lack of trust and usability problems, and describes steps taken in the redesign process to address these issues based on learning from users.