I have been advised by our SEO company that every product on our website is missing the website domain from the canonical rel tag. In their opinion, this is not good for the ranking of the website and on questioning it, we are advised this is a feature of CL websites and on checking a number of sites, i can see that this is the case.
We have been told raise this point on Canny so here I am raising it. Is there a reason why it is like this?