Your Main KPI - For eCommerce the main KPI is ROAS, and for Lead Gen the main KPI is CPL.
If you are using Google Analytics to count conversions from Google Ads, you may be missing a large chunk of conversion data.
If you are an eCommerce company, Data Feed Watch (DFW) is the platform we use in order to optimize your product feed. It allows you to customize the product feed attributes before they are sent to Google Merchant Center (which is the tool that then uploads your product listings into Google Shopping, Google Product Ads, and Google Commerce Search). DFW is part of the reason why shopping ads are so successful.
E-commerce Campaigns but built as Lead Generation.