Canonicalization can be elaborate. For that reason, there are a lot of misunderstandings and misconceptions regarding how to canonicalize thoroughly. It's possible a person have made it with GTM ? It really is realy nice Device, but it really must be inserted just after opening tag in all pages. Links, https://socialistener.com/story4274827/not-known-facts-about-automatische-hreflang-tags-en-canonieke-tags-seo