How can I use retargeting ads to recover abandoned carts?

I've been losing sleep over our cart abandonment rates. Every month, we're seeing hundreds of potential customers add products to their cart but then disappear into thin air. Our Facebook and Instagram ads are driving decent traffic, but the conversion funnel looks more like a leaky bucket. I've tried generic retargeting campaigns, but they feel scattershot—showing the same generic ad to everyone who touched a cart. The real frustration? We're burning ad budget chasing people who were never serious about buying in the first place. I know there's a smarter way to recover these abandoned carts, but I need a strategy that's precise, doesn't feel spammy, and actually understands which customers are worth re-engaging. Our margins are tight, and every wasted ad dollar hurts. I want a solution that can differentiate between a casual browser and a genuinely interested potential customer. Something that can create genuine urgency without looking desperate or overwhelming our audience with constant reminders.