utm tags / duplicate content

[Maciej Ziemczonek]

Hi there!

I've come across an opinion that using utm tags while creating Google Analytics links (source, medium,campaign) for different campaigns may result in duplicate content.

Meaning - if Google indexes a page through a link with different tags,
it will cause duplicate content to appear.

I have no evidence to support it. Perhaps you could help me? What are
your opinions on this subject?

Thanks in advance,

Maciek

[bill]

What duplicate content would be generated?

[Maciej Ziemczonek]

You have two different URLs (one without utm tags and one with utm tags) and the same content. So I assume Google might think that you have the same content under different urls.