Azure DevOps Services (now known as Azure DevOps) is a set of development tools and services offered by Microsoft to help software development teams plan, develop, test, and deliver applications more efficiently. One of the key features of Azure DevOps is its ability to facilitate the deployment of applications. Here’s how it allows developers to deploy:

1. Continuous Integration (CI): Azure DevOps allows developers to set up CI pipelines that automatically build and test their code whenever changes are pushed to a version control repository, such as Git. This ensures that code changes are regularly integrated and tested, reducing integration issues.

2. Continuous Deployment (CD): Azure DevOps supports continuous deployment by enabling developers to define release pipelines. These pipelines automate the process of deploying applications to various environments, such as development, testing, staging, and production. When code passes the necessary tests in the CI pipeline, it can automatically trigger the deployment pipeline to push the code changes to different environments.

3. Release Management: Azure DevOps provides a user-friendly interface to define the deployment stages, tasks, and conditions for each stage. This includes setting up pre-deployment and post-deployment actions, approvals, and gates to ensure that the application is stable before moving to the next environment.

4. Infrastructure as Code (IaC) Integration: Azure DevOps supports the use of Infrastructure as Code tools like ARM (Azure Resource Manager) templates and Terraform. This allows developers to define and manage their application’s infrastructure alongside the code, making it easier to provision and manage resources consistently across different environments.

5. Integration with Azure Services: Azure DevOps integrates seamlessly with Azure services, making it particularly efficient for deploying applications to the Microsoft Azure cloud platform. You can deploy web apps, APIs, databases, and more to Azure using predefined tasks and templates.

6. Multi-Platform Deployment: Azure DevOps supports deploying applications to various platforms, not just Azure. You can deploy to on-premises servers, other cloud providers, or even container orchestration platforms like Kubernetes.

7. Customization and Extensibility: Azure DevOps allows developers to customize their deployment pipelines using a variety of built-in tasks and extensions available in the Azure DevOps Marketplace. This enables teams to tailor their deployment process to their specific needs.

8. Monitoring and Reporting: Azure DevOps provides insights into the deployment process with detailed logs and reports. This helps developers identify issues quickly and improve the overall deployment workflow over time.

In summary, Azure DevOps Services enables developers to deploy applications more efficiently by automating the build, testing, and deployment processes, integrating with various tools and platforms, and providing a range of customization options for deployment pipelines.