Using conflicting or contradictory tags in your web site. You should constantly use constant and coherent tags with your page. For instance, you should not use and on the exact same page. This could confuse engines like google and could result in them to ignore or penalize your webpage. Website https://prestashopopengraphtwitte24766.howeweb.com/29412723/the-ultimate-guide-to-hreflang-tags-wordpress