Hi Kezzi:
If the the utm pages (which are duplicates of the original page) have self-referencing canonical tags, won't they still be duplicates of the original page?
For example, let's say we have:
example.com/ and example.com/utm_source=tpi
All these pages have hrelfang, but the pages with utm are duplicates of the original, so I would assume that we need to have example.com/utm_source=tpi have a canonical tag pointing to example.com/
In addition, example.com/nl/utm_source=tpi would have a canonical tag pointing to example.com/nl/
Thanks!