There are many tools available besides Azure DevOps. Two other well-known tools are GitLab CI and Jenkins. Some very basic knowledge of these tools will help you to understand how to integrate with them if that is ever necessary. Also, a limited understanding of other tools will help you to more quickly understand the concepts and generalize your knowledge of how to work with these other tools.
To highlight how these tools work with the same concepts, both examples in this section are equivalent to the Azure DevOps YAML pipeline in the Writing a YAML build definition section.