Conversion Rates: Track changes in conversion rates before and after introducing BNPL options in your email campaigns. Average Order Value (AOV): Measure any increase in AOV, as customers may be more inclined to make larger purchases when they can pay over time. Click-Through Rates (CTR): Analyze the CTR of emails that feature BNPL options to see if they generate more engagement. Customer Feedback: Collect and review feedback from customers regarding their experience with BNPL. This can help you refine your approach.