On the different tabs on the Campaigns page, you can use columns and filters, segments, and the date range to organize your performance data in the table. Once you have your data the way you want it, you can download it into a .csv (regular or zip) or Excel report to conveniently share the information with your clients, or use for further analysis. If you compare the total row on the Ad Groups tab for a specific column with what shows on the Campaigns tab, the decimal value totals (e.g. avg. CPC, avg. position, avg. CPM) may be slightly different because of rounding. These differences may occur between Ads and Ad Groups, and Keywords and Ad Groups.
If you compare the total row on the Ad groups tab for a specific column with what shows on the Campaigns tab, the amount can be slightly different based on rounding.