As per my discussion with Adobe Support, Google Discovery and Showcase campaigns data is not syncing with Adobe Analytics when we try to integrate advertising data into Adobe Analytics using Advertising Analytics feature. This issue is resulting into lower impressions, clicks and cost data than the actual data. Providing support to Discovery as well as Showcase campaigns through Advertising analytics will provide actual performance of these campaigns to customers as all of the impressions, clicks and cost etc data will be available. Also, apart from this there is no direct or easier way to bring all advertising data into Adobe analytics and resolving this issue may improve usages of this features and increase customer retention.
Support ticket Number : [Incident: 191231-000039]