The All Accounts tab provides a summary view of all your accounts across Google AdWords, Yahoo Search Marketing and Microsoft adCenter (Bing).
At the top of the page, you see two pie charts, displaying the breakdown of your costs and revenues by account.
The next chart displays the performance of key metrics over a specified time period. The default metric displayed in this graph is Clicks. To change the metric, select a different one from the drop-down box on the upper-right of the graph. The metrics from which you choose include impressions, clicks, CTR, cost, conversions, conversion rate, revenues and ROAS (return on ad spend). By default, this chart displays a cumulative view of your accounts, but you can also view your accounts separately by clicking the Comparisons - radio button.
Finally, a chart at the bottom displays a summary of all your accounts. It includes the account name, the ad network the account's ads appear on, and, for the time period you selected, total impressions, total clicks, average CTR, total cost, total conversions, average conversion rate, total revenue, and ROAS. This information is displayed for each of your accounts, and an aggregate total across all accounts is displayed at the bottom.
The default date range for these charts is Last 30 Days. To change the date range, either choose one of the options from the drop-down box in the upper right, or enter a custom date range by using the pop-up calendar buttons next to the Begin and End fields.