When would one typically use bulk updates in trademark management?

The correct choice highlights a situation where bulk updates are particularly beneficial in trademark management. When the owner information needs to be updated across several trademark registrations, using bulk updates streamlines the process significantly. This is crucial for maintaining accurate and consistent ownership records across all registrations, ensuring that any legal notifications or communications related to the trademarks reach the appropriate party.

In contrast, applying for multiple new trademarks at once typically involves separate applications for each mark, which means bulk updates are not relevant in that context. Filing a complaint regarding infringement is a legal action that does not pertain to updating trademark registrations and, therefore, would not utilize bulk update functionality. Lastly, while registering a trademark with multiple categories is indeed possible, it also involves individual applications for each category and thus would not involve bulk updates if the trademarks are being registered for the first time.