If you want to modify multiple campaigns at once, which component of the campaign manager tab should you use?

The correct answer is "Bulk actions" because this component allows users to modify multiple campaigns at once, making it efficient for advertisers who need to implement changes across several campaigns simultaneously. Bulk actions provide options to update settings such as budget, targeting, or ad creative in large quantities without having to adjust each campaign individually. This is especially useful for saving time and ensuring consistency across campaigns. While "Export" is used to download campaign data for analysis and "Filter by" helps in sorting campaigns based on specific criteria, neither offers the functionality of making broad modifications to multiple campaigns like "Bulk actions" does.