Zero impressions with non-zero clicks

[Devesh Parekh]

I understand why there may be more clicks than impressions in some cases, but I'm seeing a case where there are zero impressions and still a click (and associated cost). How should I interpret that data?

Query:
SELECT Id, Date, AdvertiserExperimentSegmentationBin, AveragePosition, Cost, Impressions, Clicks, Conversions FROM ADGROUP_PERFORMANCE_REPORT WHERE HourOfDay = 16 AND CampaignId = 172128788 AND Status = 'ENABLED' DURING 20130513,20131109

CustomerId: 880-424-2085

Questionable line in the report:

9927814508,2013-11-09,control,0.0,710000,0,1,0

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Devesh

[Devesh Parekh]

Mystery solved: I see an impression for that adgroup in the previous hour.

To summarize what I've learned about the reports: impressions are tracked at the time they've occurred, clicks are tracked at the time they've occurred, and conversions are tracked at the time the click occurred.

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Devesh