There may be not any totally free addon for installing Google Tag Manager in PrestaShop apart from buying a paid out addon. Prestashop also doesn’t give access to Web site code so we can easily add Tag Manager code but there's still an alternate way by instantly modifying the website https://growthbookmarks.com/story17722410/tag-hreflang-automatici-e-tag-canonici-seo-for-dummies