Facebook Lead Ads are a marketing tool that allows businesses to advertise to people already interested in their product or service, within the social network they're already spending time in. This can be particularly effective for eCommerce businesses looking to communicate with new customers and build loyalty among shoppers. By using Facebook Lead Ads in conjunction with app automation tools like Zapier, businesses can automate tasks such as exporting leads, sending follow-up emails, and updating customer records, making it easier to stay in touch with new customers and improve the overall customer experience.