CI/CD is a critical practice in DevOps that automates merging code changes, building entire codes, and running tests. It offers several benefits including faster software releases, early bug detection, quick rollbacks, and increased developer productivity. Jenkins, GitLab, CircleCI, TravisCI, Bamboo, TeamCity, Azure Pipelines, AWS CodePipeline, GitHub Actions, ArgoCD, and CodeShip are some of the top CI/CD tools that can be used to implement this practice. Each tool has its unique features and pricing, making it essential to choose the right one for your needs.