The prestashop addon really helps to apply search engine optimization of your online store by including automatic hreflang, and canonical tags. You are able to code this yourself, but then have to keep up the code likely forward. This is exactly why an application is frequently the better route as https://addons.prestashop.com/pl/seo-pozycjonowanie-naturalne/31857-automatyczne-google-rich-snippets-json-ld-opengraph-seo.html