The module automatically provides a default canonical url to your item, category, CMS pages only. By default, the module works by using The existing url in the page as the default canonical url. Evaluation the groups of duplicates. Decide one canonical Variation that ought to be indexed inside the search https://www.presta-addons-modules.com/en/opencart-seo-automatic-google-rich-snippets-json-ld-integration-opengraph-twitter-tags-schemaorg.html