The interaction between UiPath Studio and the UiPath Robot Service performs the function of executing or debugging a process. UiPath Studio is the design tool that allows users to create, edit, and test automation workflows. UiPath Robot Service is the component that runs the automation workflows on the machine. It communicates through an inter-process communication channel with Studio, the UiPath Assistant, and Robot Command Line Interface to receive and process information, and then to provide the necessary instructions to the Robot Executor. When a user wants to execute or debug a process from Studio, the Robot Service receives the command and launches the Robot Executor in the appropriate mode and session. The Robot Executor then performs the actions defined in the workflow and sends back the status and logs to the Robot Service, which in turn relays them to Studio. Reference:
Robot - Robot Service - UiPath Documentation Portal
Studio - Debugging - UiPath Documentation Portal
Robot - Executing Processes - UiPath Documentation Portal