Azure DevOps provides services such as Azure Boards, Azure Repos, Azure Pipelines, Azure Test Plans, and Azure Artifacts to create a DevOps lifecycle in a company.
Azure Boards is a Kanban board that helps to assign the work to others and can check for the bugs with information about bugs. Azure Repos is built on GitHub since it is also a Microsoft product. Azure Test Planning is a tool for testing that provides both manual and automated testing. Azure Artifacts is a storage bin for storing packages but can store any type of file.
In case you are interested to learn Azure DevOps, I recommend you enroll in Azure DevOps Training by Intellipaat.
You can watch this video on Azure DevOps to have an understanding of Azure DevOps services: