Setting up Approval Workflow and Share setting inside Marketing Cloud can be used to control what content is available to certain users and business units, what is allowed to be edited, and ensure those edits are reviewed prior to being changed. Approval Workflow allows users to submit content for approval before it can be used in messages or journeys, while Share setting allows users to share content across business units with different levels of access. Reference: https://help.salesforce.com/articleView?id=sf.mc_co_approval_workflow.htm&type=5 https://help.salesforce.com/articleView?id=sf.mc_co_share_content_across_business_units.htm&type=5