This document provides an overview of Spinnaker, an open source tool for continuous delivery. It discusses the traditional software delivery lifecycle and issues with manual processes. Continuous delivery is presented as a better approach using automation to deliver software frequently with automated testing and feedback. Spinnaker is introduced as a tool that provides features like pipelines, cloud drivers, and image deployments to help enable continuous delivery. The document demonstrates Spinnaker's capabilities through a multi-cloud deployment demo.