The simplest is if it provides you with an installation file. You'll acknowledge if that is the circumstance if it finishes in _theme.ocmod.zip. In that scenario, all you'll want to do is go to Extensions > Installer Listed here, you find a list of each of the coupons existing on https://www.presta-addons-modules.com/en/opencart-seo-automatic-google-rich-snippets-json-ld-integration-opengraph-twitter-tags-schemaorg.html