Final answer:
On the Now Platform, the Process Automation Designer is used to author cross-enterprise workflows and create unified processes.
Step-by-step explanation:
Users can author cross-enterprise workflows and create a single, unified process on the Now Platform using the Process Automation Designer. This tool enables the design and implementation of complex workflows that can span multiple departments and processes, ensuring a streamlined and cohesive workflow experience. It's part of the broader suite of automation tools provided by ServiceNow to enhance operational efficiency across an organization.