What KPIs should I use to measure abandoned cart recovery performance?

As a Shopify store owner, I've been losing sleep over abandoned carts. Every day, I watch potential revenue slip through my fingers—shoppers adding products, getting to the cart, and then mysteriously disappearing. My ad spend is solid, traffic is good, but my conversion rate feels like it's stuck in quicksand. I've tried generic pop-ups and discount codes, but nothing seems to move the needle consistently. I know these abandoned carts represent real money left on the table. My team keeps asking, 'How can we understand why customers are leaving and develop a systematic approach to bringing them back?' We need more than just gut feelings—we need data-driven insights that can help us craft a precise, targeted cart recovery strategy. It's not just about throwing discounts around; it's about understanding customer behavior, identifying friction points, and creating personalized interventions that actually convert hesitant shoppers.