Ecommerce analytics for a pet brand selling on both Shopify and Amazon requires unifying order, customer, and repeat-purchase data across both channels into one system, since Amazon does not share customer-level data back to your core analytics and Shopify alone only shows part of your total business. Pet brands face an added layer of complexity: most pet products are consumable or replenishable, meaning reorder cycles and subscription behavior matter as much as first-time conversion.