Snapshots
When you run a campaign report, you can save the report's parameter settings and create a snapshot of the information from the Report Explorer.
The snapshot provides a read-only view of the report's results. It does not include information added or changed after you take the snapshot. You can use snapshots to get a quick view of a campaign's performance over time. For example, when you create a snapshot each year of the primary goals for your top-level campaigns, you can compare these results to the same information for the current year. From the campaign record, you can view any report snapshots available for the campaign from the Snapshots tab.
For more information about snapshots and report explorer, see the Report Explorer section of the help file.