This document summarizes a UX design class that covered heuristics. The class discussed the history of heuristics, the top 10 heuristics according to Nielsen and Shneiderman, including feedback, consistency, user control and error prevention. It also provided examples of applying heuristics to social media profiles and in evaluating two vendor designs. The document aimed to explain why learning heuristics is useful for defending designs, speaking a common language with other UX designers and staying knowledgeable in UX.