I don't know what metrics you guys choose for analyzing facebook ads campaign but according to my knowledge if you are getting your objective on your facebook ads then here is some metrics that you should analyze that either they are running well or there is some changes required in it.and the metrics are...CTRCPCCPMCPACheck this to understand facebook metrics in detail: 11 Important Facebook Metrics You Should Never Ignore

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...