Azure Repos is a cloud-based service provided by Microsoft Azure that offers version control for software development projects. It allows teams to manage their code repositories using either Git or Team Foundation Version Control (TFVC). This enables developers to track changes, collaborate on code, and maintain a history of their work. With Azure Repos, users can create branches for new features, conduct code reviews, and merge changes seamlessly. The service integrates well with other tools in the Azure DevOps suite, enhancing the overall development workflow and ensuring that teams can deliver high-quality software efficiently.