Azure DevOps is a suite of 5 services you use together or independently. For example, Azure Pipelines provides build services (CI) as well as release management for continuous delivery (CD) to any cloud and on-premises servers. Azure Repos provides unlimited private Git hosting, Azure Boards provides agile planning (issues, Kanban, Scrum, and dashboards). Please note that there's a separate tag for Azure DevOps Server (formerly TFS) - the on-prem version.