This document discusses the use of linear algebra in various domains such as graphs and networks, chemistry, mechanics, quantum computing, chaos theory, coding and error correction, data compression, solving systems of equations, games, statistics, game theory, neural networks, Markov chains, splines, symbolic dynamics, inverse problems, and a "Will Hunting" problem posed in the movie Good Will Hunting. Linear algebra provides useful tools and representations for understanding concepts in these diverse areas. The document aims to illustrate the wide applicability and relevance of learning linear algebra.