Final answer:
To view previous changes to a line item or insertion order, you can use the Change History Report or the Line Item Edit Log.
Step-by-step explanation:
To view previous changes to a line item or insertion order, you can use the Change History Report in the system. This report provides a detailed log of all modifications made to the line item or insertion order, including the date and time of the change, the user who made the change, and the specific modifications that were made.Another option is the Line Item Edit Log, which records changes made specifically to a line item. It allows you to track the history of changes made to a particular line item, such as changes to targeting, bids, or creatives.Both the Change History Report and the Line Item Edit Log can help you track and review previous changes, giving you a better understanding of the revisions and modifications that have been made over time.