So as to add a meta key word, click the field and validate by pressing "Return". You may clear away tags by clicking the cross. Canonical URLs are used to prevent replicate written content and to indicate to search engines like google and yahoo and that is the “first” site. https://webcastlist.com/story20419711/the-2-minute-rule-for-automatische-hreflang-tags-und-kanonische-tags-seo