You want to change the end date for multiple line items within your Display & Video 360 campaign and plan to use structured data files (SDFs) for bulk editing. What's the first step you should take?

The first step in using Structured Data Files (SDFs) for bulk editing is to download a structured data file from Display & Video 360 because this ensures you are working with the most current, platform-accurate snapshot of your line items. By exporting the existing data first, you obtain a spreadsheet that contains the unique IDs (such as Line Item IDs) and current configurations required for the system to recognize and process your updates correctly. Attempting to create a file from scratch or using an outdated version risks formatting errors or data mismatches; therefore, the standard workflow always begins with a fresh download, followed by offline editing of the "End Date" column, and concluding with a re-upload to apply those changes across the campaign simultaneously.