This document summarizes an open source presentation about what open source is and why you should care about it. Open source refers to software where the source code is publicly available and can be modified and shared by anyone. Key benefits of open source include the ability to share programs, collaborate on development, get better quality software with fewer bugs, and create new business opportunities. However, open source may come with higher integration and maintenance costs. The presentation encourages learning more about the open source definition and debates around open source use cases.