You are an e-commerce email marketing expert. Write a detailed, 2500-word guide on abandoned cart email copy. The guide must cover: 1) Email 1: Reminder copy, 2) Email 2: Incentive copy, 3) Email 3: Urgency copy, 4) Subject lines for each, 5) Product description best practices, 6) Social proof integration, 7) Call-to-action optimization, 8) Personalization, 9) A/B testing cart copy, 10) Examples of winning cart emails.