Instalacja GTM w PrestaShop 1.6 i 1.7

Prestashop 1.6

https://www.youtube.com/watch?v=fiU2hyDs_Bg

Prestashop 1.7

https://www.prestashop.com/forums/topic/601992-adding-google-tag-manager-code-to-prestashop-17/

Kod wklejamy w pliku themes/classic/templates/layouts/layout-both-columns.tpl