This document provides an overview of lessons learned with CI/CD, including discussing CI/CD types and tools for code quality, Docker builds, and application and mobile CI. It covers topics such as Concourse CI, Gitlab CI/CD, Circle CI, Travis CI, Tekton, Jenkins, Azure DevOps, Semaphore, Bitrise, Cirrus CI, Spinnaker, Argo CD, Flux CD, SonarQube, Code Climate, Infer, BuildKit, BuildPacks, Jib, and Kaniko. The document serves as a presentation about CI/CD workflows and technologies.