Shopify Schema Markup for Critiques Widget is usually fairly demanding (as it depends upon the assessment apps that you're using), I recommend you leave it to your professionals. Check out Schema.org and find the particular style of microdata formats you’d like to implement. You may also pay a visit to https://www.presta-addons-modules.com/en/front-office/prestashop-online-offline-chat-support-with-jivo-chat.html