Installation : Phase 1: Upload the module zip file from the back-office Module & Services menu tab. Module Manager region using the upload button. Right after productive installation module menu link will seem inside the left menu or the best menu during the back-office additional place. Phase two: Install the https://addons.prestashop.com/en/seo-prestashop-modules/91503-seo-gtmetrix-speed-test-api-integration.html