I would also say that depending on exactly where you have your ads showing you should be pretty accurate. Some trackers will only count an ip once rather than keep counting them as the same, so if your system is not up to date, it may be loosing some here. I would start small, and turn off both search network and content targetting, and run a few test campaigns with minimal dollars. Do this for a few days and see.
KG
This is already the case...i spend $2.00 per day for one ad, and both search network and content targetting are off.
To start what exactly are you using to track? Your raw server logs or third party trackers?
I am using AWstats and another raw log file analyzer
Thanks
To start what exactly are you using to track? Your raw server logs or third party trackers?
I am using AWstats and another raw log file analyzer
Do they show the exact same numbers? I've used Webalizer, analog, and summary for log analysis and can get wildly different numbers with the same raw logs. (Essentially attributable to how well each one plays with corrupt log file lines.)
i spend $2.00 per day for one ad
We spend in the four digits each day so we have far larger numbers to compare. We use Google's own conversion tracking, our own web logs, an external bid manager tool, and a fraud-checking tool, so we have many numbers to compare. They are never identical, but the variance is low enough to be ignored most of the time. Google also refunds what it considers invalid clicks almost every other month, although I have no way to tell if it is accurate.
Allowing for cache servers etc, I cannot believe what I am seeing. I reckon at least 40% of clicks on our Ads are fraudulent.
So even if the log files match with the Google figures, I am still paying for fraudulent clicks anyway.
We need to trust Google implicitly to relax. Yes there will be differences in logs from Google figures. But how do we quantify the accuracy of this?
Disclaimer: I haven't had it long enough to recommend it for that purpose. It has some side benefits, such as seeing the site where an AdSense ad was clicked or the keyword used. It is quite a different view than one from our regular log analysers because you see the keyword next to the specific URL, whereas the log analysers give us a sterile list of keywords used.