Google Analytics and SEO

Fixing Campaign Tagged URLs for Improved SEO

While attending the 2008 GAAC Summit at the Googleplex Robbin Steif of Lunametrics raised an interesting point regarding URLs that have Google Analytics campaign tags. Robbin pointed out that campaign tagged URLs can adversely effect SEO (Search Engine Optimization) as a result of duplicate content and that the _setAllowAnchor(true) function can be used to alleviate the problem.

Okay, great, but can you repeat that in English?

Basically, Google sees a page on your site and campaigned tagged URL for the same page as actually being two separate pages. Then when we come to SEO, websites and pages can be given lower priority if there is duplicate content.

We have a landing page about being a Google Analytics Authorized Consultant: www.mangoldsengers.com/google-analytics-authorized-consultant

And we have a campaign tagged link to the same page on the Google Analytics partner page that looks like this: www.mangoldsengers.com/google-analytics-authorized-consultant?utm_source=gaac-listing&utm_medium=referal&utm_campaign=google-analytics

Although these are the same page Google sees them as two separate pages, so now the question is how do I fix the problem?

How to Fix Campaign Tagged URLs for SEO

Luckily, Google doesn't index anything after a # in a URL, so basically we need to change this: www.mangoldsengers.com/google-analytics-authorized-consultant?utm_source=gaac-listing&utm_medium=referal&utm_campaign=google-analytics to this: www.mangoldsengers.com/google-analytics-authorized-consultant#utm_source=gaac-listing&utm_medium=referal&utm_campaign=google-analytics

Google does not index anything after a destination anchor (i.e. the #), so now: www.mangoldsengers.com/google-analytics-authorized-consultant and www.mangoldsengers.com/google-analytics-authorized-consultant#utm_source=gaac-listing&utm_medium=referal&utm_campaign=google-analytics will be seen as the same page by Google. No more duplicate content!

Now that you have fixed the URLs, we need to get the campaign variables into Google Analytics. This is simply achieved by using the _setAllowAnchor(true) function that Robbin mentioned at the summit.

Your GATC (Google Analytics Tracking Code) will need to be modified (you will need to replace UA-XXXXXXX-X with your Google Analytics profile ID):

<script type="text/javascript">
var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
</script>
<script type="text/javascript">
try {
var pageTracker = _gat._getTracker("UA-XXXXXXX-X");
pageTracker._setAllowAnchor(true);
pageTracker._trackPageview();
} catch(err) {}</script>

If you have any questions or need help implementing SEO friendly campaign tags for Google Analytics then please get in touch!

Labels: ga.js, Google Analytics, Google Analytics Tips, SEO