An orchestration or pipeline is all about defining a sequence of execution to manage an application life cycle based on requirements.
A simple example can be that you may want to perform a static code analysis first; if it complies to the defined quality gate, then it should only perform Continuous Integration and create an application package that can be deployed in a specific environment.
Once the package is ready, deploy it into a test environment for manual or automated testing based on the requirements and defined policies in the organization. Once it is promoted for UAT or the staging environment, then you may want to perform functional test execution and performance testing.
Once this flow is completed, you may want to deploy it in a production environment, but not without the approval of the specific stakeholder.
This is the orchestration of build jobs or...