Hello,
We have our own database which is synchronized from AdWords reports. We retrieve the data with many segments, including date, device, networktype and also clicktype. For most uses of the data we have to aggregate the data. Usually this means that we add: if we want to get the number of clicks in a month, we add the clicks of every day in that month.
The one exception is impressions in the segment clicktype: if we want to know the total impressions, and only have the impressions for each clicktype, then we do NOT add all impressions for each clicktype: we only use the impressions from the clicktype record "Headline".
Well that worked three years ago, apparently this is no longer true. We noticed that clicktype "Phone calls" should also be added, so to get the sum, we should add the impressions of clicktype records "Headline" and "Phone calls", and ignore the rest.
My question: Is that rule correct? Or, what is the current rule?
Note: Some in this forum suggest that we should leave out segment clicktype to get the aggregated value. But we already use 20 (!!) different AdWords reports for a single account, and if we add reports without this segment the number goes up to 25 (or 30, I have to look into that). Therefore I prefer to implement the right aggregation rules...
Thanks in advance.