The Filter tab in Model Review allows you to further control what elements are checked within the Revit model.
Filters are used primarily to address which specific elements should be tested, or to provide exceptions which should not be tested.
Once you define a filter, add it to the active list using the Add button.
Rather than scanning the entire model, a filter can be applied to focus on a specific category of elements.
In a situation where you want to ignore rooms smaller than a certain square footage (ROOM_AREA > 9 S.F.).