While this basic workflow configuration is incredibly useful, it is certainly not the end of the road and there are numerous advanced actions that Codemagic can help you with.
We encourage you to investigate Running tests with Codemagic to get you started with testing, as well as additional guides such as the one on running tests on Firebase Test Lab or Registering iOS test devices.
Documentation on using codemagic.yaml teaches you to configure additional options such as changing the instance type on which to build, or configuring builds to be automatically triggered on repository events.