DevOps is an approach that combines people, processes, and products to enable continuous delivery of value to end users. It brings together development and operations teams, automates the software delivery process, and provides continuous software updates and monitoring. Key technologies for DevOps include continuous integration (CI), continuous deployment (CD), and continuous monitoring. Azure DevOps provides tools like Azure Pipelines, Azure Boards, Azure Repos, and Azure Test Plans to support DevOps practices and workflows in the cloud.