What is Azure DevOps and how is it used?

Azure DevOps is Microsoft's all-in-one DevOps platform covering the full software development lifecycle.

**5 main services:**
1. **Azure Boards** — Agile project management (like Jira)
2. **Azure Repos** — Git repositories (like GitHub)
3. **Azure Pipelines** — CI/CD pipelines (build + deploy automation)
4. **Azure Test Plans** — manual and automated testing
5. **Azure Artifacts** — package management (npm, NuGet, Maven)

**Typical workflow:**
- Dev pushes code to Azure Repos
- Azure Pipelines automatically builds and tests
- On success, deploys to Azure App Service or Kubernetes
- Azure Boards tracks the work item as Done

Free tier: 5 users free, unlimited public pipelines.