To design a peer-to-peer lending product on Facebook, there are a number of important considerations. First, it's important to understand the target audience and their needs. Who is most likely to use this product, and what are their pain points when it comes to lending and borrowing money? Once this is understood, the product can be designed with those needs in mind. Next, it's important to consider the legal and regulatory requirements for a lending product. This will likely involve working with legal and compliance teams to ensure that the product is in compliance with all relevant laws and regulations. When it comes to the actual design of the product, there are a number of features that should be considered. For example, there should be a way for borrowers to apply for loans, and for lenders to browse and select loans to fund. There should also be a system in place for evaluating borrowers' creditworthiness, and for managing the repayment of loans. Given that this product is being designed for Facebook, it's also important to consider how the product will integrate with the Facebook platform. For example, will users be able to sign up for the product using their Facebook account? Will there be any social features that allow users to share information about their loans with their friends and family? Overall, designing a peer-to-peer lending product on Facebook will require a deep understanding of the target audience, a strong grasp of legal and regulatory requirements, and careful consideration of the product features and how they will integrate with the Facebook platform.