After completing requirements gathering session for a Sales Cloud implementation, the business analyst (BA) has...

This answer states that definition of done is where the BA should capture these requirements after writing user stories for developing a solution for managing leads in Sales Cloud at UC: be assigned a level of effort, be demonstrated to the stakeholder, and have documented deployment steps. Definition of done is a set of criteria that defines when a user story or a task is completed and ready for deployment or delivery. Capturing these requirements in the definition of done means that the BA specifies that a user story or a task must meet or pass these criteria in order to be considered done. Capturing these requirements in the definition of done is where the BA should do it after writing user stories because it helps the BA to clarify and communicate the expectations and standards of the user stories or tasks, and to ensure that they are met or passed. References: https://trailhead.salesforce.com/en/content/learn/modules/salesforce-business-analyst-quick-look/use-user-stories-to-capture-requirements