A headless architecture is a decoupled approach where the layers or components of an application are separated, with the "heads" (frontends) operating independently from the backend logic or "core body" microservices and sharing data via API. Retail was one of the first industries to adopt this concept in 2012, focusing on building modern ecommerce solutions that can meet rapidly changing customer requirements and stand out from competitors. This approach enables companies to bring new features to market faster, scale to meet seasonal demand, and leverage best-of-breed technologies while avoiding vendor lock-in and improving talent acquisition and retention. A headless architecture also makes it easier to pinpoint issues and reduce downtime, as well as removing data silos and sharing data across multiple journeys. MongoDB is a strong fit for this approach due to its flexible document model, API capabilities, sharding capabilities, and high availability, allowing developers to deliver faster with no downtime, scale effortlessly, support composable architectures, and provide a seamless experience to customers.