I've been using the placement report in Google AdWords (love it) to restrict what sites my content network runs on. Optimizing spend and impressions. Going well until recently I realized that the report showed a low number of impressions in relation to what shows in AdWords.
I split out my campaigns into content and non-content, so I know how many impressions I'm supposedly getting. On the 17th, I show 4,753 impressions on my content campaign. The Placement Report shows 677 impressions that day - and the regular campaign had 2576 (thought that might have something to do with it, but nope).
Anyone else seeing this? Testing this here before I post about it. :)
I recently asked my rep about that and here was the response:
Due to the large volume of data a Placement Performance report can include, there are several factors that can affect the data that you see in the reports. If you notice a discrepancy between the Placement Performance report and the content totals in your account statistics, please consider the following:
1. The Placement Performance report can take more time to update than your account statistics. We recommend you run this report after 3 p.m. PST to get the most accurate metrics for the previous day.
2. Statistics from some properties that are a part of the Google content network may not be included in the Placement Performance report.
3. Sites that have accrued a negligible number of impressions per day may not be included in your report.