Combine Google Tag Manager using your Prestashop store to simply take care of and deploy the advertising and marketing tags with no need to alter the code. By default you need to leave this element enabled, as disabling it has an effect on the whole inventory management of your store. https://addons.prestashop.com/de/seo-suchmaschinenranking-optimization/30904-automatische-hreflang-tags-und-kanonische-tags-seo.html