Final answer:
The reason for flagging someone is noted in a central platform or system used for content moderation.
Step-by-step explanation:
In the context of CM (Content Moderation), the reason for flagging someone is typically noted in a central platform or system used to manage and track flagged content. This platform could be a specialized software or a part of a larger content management system (CMS). The reason for flagging could be specified in a separate field or category within the platform, where a CM team member can select from predefined options or enter a custom reason.