Update 7/12/2006: With the introduction of the Google Analytics "AdWords Analysis" report, the methodology described below is no longer necessary to track AdWords Ad Creatives using A/B Split tests. Instead, please refer to our post about using the new AdWords Analysis report (be sure to scroll closer to the bottom of the article to learn about tracking AdWords ad creatives using A/B split tests).
No matter the goal of your Google Adwords campaign one thing is always necessary; constant optimization! While Google's "Auto Tagging" option is an easy way to get basic tracking data, with just a little more effort it is possible to take your tracking to a higher level!
By adding additional tracking codes to your referral URL link and turning off auto tagging, you are able to drill down even further in Google Analytics, allowing you to make the most out of every advertising dollar.
UTM, which stands for Urchin Traffic Monitor, are tags which are added to the end of your destination URL in order to add specific data to your paid tracking within Google Analytics. These tags identify such variables as campaign, source, medium, content, and search term.
Currently with the Google AdWords "Auto Tagging" feature the utm_content variable identifies each ad by the first line of text. This can cause problems if you are trying to implement A/B split testing because Auto-Tagging simply passes the ad text headline to the utm_content variable. This makes it impossible to differentiate tracking data from two different ads that share the same headline.
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