: Where are "Duplicate Campaign Parameters" coming from in Google Analytics? I keep getting this notice in Google Analytics: Duplicate Campaign Parameters Property [site name] is receiving hits

@Odierno851

Pixl's answer explains why you are getting the "Duplicate Campaign Parameters" message from Google Analytics. However, your question also appears to be looking for where these campaign parameters are coming from. In the comments Pixl also pointed out that anybody could link to you with those parameters.

Another possibility is that someone (accidentally or otherwise) is using your Google Analytics number on their webpages. Best practices recommends maintaining an unfiltered property to keep all raw data, but I would also recommend having one where you filter out traffic that isn't from your domain. It will provide a clearer view without any "junk" data from other domains. I would also recommend that you add the lowercase filter that Pixl referred to unless you plan to track campaign parameters separately based on if they have uppercase or lowercase letters.

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@Gloria169

This error can be caused by different teams of people using the campaign tagging system internally and not keeping a consistent naming convention.

If that isn't the problem it can also be caused by third parties add UTM campaign parameters to links pointing to your site with common words with different casing.

The best way to resolve this error would to bring everyone together and establish a rule of practice and stick to it. Although if that doesn't solve your issue..

Google has these handy lowercase filters you can add to your view which works great for fields such as source and medium but I would advise against the other fields normally used for google adwords or other case-sensitive things if you have them integrated.

To create it, navigate to your current filters admin panel and click add a New Filter, select Advanced, then Lowercase, and then the field you wish to lowercase, like Campaign Source.

You can find more info on campaign tagging on LunaMetrics, a great analytics blog

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