Hi, As i am running an ecommerce store i didn't get or face any issue
regarding eCommerce SEO from their codding but yes there might be some
issue may generate if you are using any unauthorized or low popular apps
so it is better to take some popular apps which are mentioned @App
Store: Ecommerce App Marketplace by Shopify & Best Shopify Apps for Your
E-Store in 2017 - Withintheflow because some time html error or bugs
accrue when they update their apps features and it can be effect your
website...