You're running the ads, writing the product descriptions, answering support tickets, and somehow also supposed to know your blended ROAS before the next PO goes out. Ecommerce analytics for founder who handles marketing themselves usually means one thing in practice: logging into four different tabs at 11pm and doing math by hand. Shopify tells you revenue. Amazon Seller Central tells you a different version of revenue. Meta Ads Manager tells you a ROAS number that doesn't account for returns or COGS. Google Ads tells you a CPA that ignores everything else happening in the business.