Explore the fundamental concepts of Higher Grothendieck Witt groups in this comprehensive lecture, delivered as part of the (Junior) Hausdorff Trimester Program Topology: Workshop "Hermitian K-theory and trace methods." Delve into the intricate world of algebraic topology and category theory as the speaker provides a thorough introduction to this advanced mathematical topic. Over the course of one hour, gain insights into the theoretical foundations and applications of Grothendieck Witt groups, setting the stage for further exploration in subsequent lectures.