The Report Service provides advertisers with performace data click, cost, impression and conversion performance data at the campaign, ad group and targeting level.
For campaign and ad group reports, the returned data structures will contain the sum of all clicks and cost data across all targeting types.
Please note that neither impression nor conversion data is available before 03/22/2008. API requests for campaign, ad or keyword impression or conversion data before that date will result in an error.
For the sake of brevity, details on the reporting methods for the different levels of advertiser account hierarchy have been seperated. Please visit the links below for more details on any particular reporting type.