Final answer:
In SAP Data Services, a Conditional object is used to execute a process only if a defined expression evaluates to true, providing control over the process flow based on conditions.
Step-by-step explanation:
When designing an SAP Data Services process that needs to execute based on a specific condition, you would use a Conditional object. This tool allows you to define and evaluate an expression, and only if the expression returns true, will the execution of the subsequent workflow, dataflow, or script proceed. It is essentially a decision point within the ETL (Extract, Transform, Load) process that ensures control over the flow of operations based on dynamic data conditions or predefined logic.