We recently announced upcoming changes to AdWords Impression Share metrics. If you are using the AdWords API to download BudgetLostImpressionShare, ImpressionShare, QualityLostImpressionShare and ExactMatchImpressionShare metrics in account and campaign performance reports, then the upcoming change will affect you in the following ways:

  • We will revise campaign-level Impression Share metrics from May 1, 2011 to present. You may notice some adjustments in past campaign-level Impression Share data once this change goes live.
  • We will remove campaign-level Impression Share metrics prior to May 1, 2011. If you depend on historic impression share data prior to May 1, 2011, then you need to download them before January 30th.
  • All Impression Share metrics will only be updated once every day, by afternoon PST. In addition, the data will no longer be available for segmentation by hour. If you have a saved report definition that requests hourly aggregation of IS data, then those definitions will stop working once the new changes go live.

If you wish to backup old Impression Share data or make changes to the way you use Impression Share to control your AdWords campaigns, please do so before January 30th. If you have any questions about the AdWords API, check out our developer forum.