A process map is a visual representation of a business process that helps to engage stakeholders, identify improvements, and start the change process. By creating a process map, the business analyst can understand the current state of the process, identify pain points and opportunities for improvement, and communicate the findings and recommendations to the stakeholders. A process map also helps to initiate the change process by providing a baseline for measuring the impact of the proposed solutions. References:
https://trailhead.salesforce.com/content/learn/modules/salesforce-business-analyst-certification-prep/business-pro