Azure DevOps, now known as Azure DevOps Services, is a set of development tools and services provided by Microsoft for software development, collaboration, and project management. It encompasses a range of features that support the entire software development lifecycle, from planning and coding to building, testing, deploying, and monitoring applications.

Azure DevOps offers several integrated services, including:

1. Azure Boards: This service provides features for tracking work, managing backlogs, creating and prioritizing tasks, and planning sprints using Agile methodologies.

2. Azure Repos: This is a version control system that supports both Git and Team Foundation Version Control (TFVC). It allows teams to manage their source code repositories and collaborate on code.

3. Azure Pipelines: A powerful continuous integration and continuous delivery (CI/CD) platform that helps automate the build, test, and deployment processes for applications. It supports multiple languages, platforms, and deployment targets.

4. Azure Test Plans: This service supports manual and exploratory testing, test case management, and provides insights into the quality of the application through test reporting and analytics.

5. Azure Artifacts: A package management system that allows teams to create, host, and share NuGet, npm, and Maven packages within their organization.

6. Azure DevTest Labs: A service that helps developers and testers quickly create environments in Azure while minimizing waste and controlling costs.

Azure DevOps enables collaboration among development, operations, and testing teams, promoting DevOps practices. It helps in streamlining processes, automating repetitive tasks, and maintaining a strong feedback loop, which ultimately leads to faster and more reliable software delivery.

In addition to its features, Azure DevOps also integrates well with other Microsoft services and tools, as well as third-party tools, allowing organizations to build a customized toolchain that suits their development and deployment needs.