You specify the main URL since the search engine may have difficulty deciding which one particular must be the first URL.  The subsequent tutorial will tell you about tips on how to enable Canonical URLs in Prestashop one.five. Increase the indexing within your Prestashop urls in Google. This module https://addons.prestashop.com/ru/seo-natural-search-engine-optimization/31857--rich-snippets-json-ld-opengraph-seo.html