You can download campaign settings and upload modifications via bulksheets in either your advertiser, order, or entity view.

This statement is true. Amazon DSP allows users to download campaign settings and upload modifications using bulksheets at the advertiser, order, or entity (line item) level. This functionality is crucial for managing large-scale campaigns efficiently, enabling bulk edits to bids, budgets, targeting, and other settings across multiple campaigns or line items simultaneously. Instead of making individual changes through the UI, bulksheets streamline the process, saving time and reducing the potential for manual errors.