Serverless architectures are a natural extension of microservices, breaking down functionality into finer-grained components that run as isolated, autonomous functions in a stateless compute service. They provide elastic scalability, rapid development and iteration, less system administration, and improved developer productivity. Serverless computing frees developers from traditional infrastructure costs by automatically provisioning servers, maintaining infrastructure, upgrading software, and only charging for consumed resources. MongoDB Atlas is well-suited for serverless architectures, providing elastic scalability, flexible schema, vendor independence, and robust security controls. However, there are many considerations to keep in mind when implementing a serverless architecture, including the need for diligent planning and careful evaluation of database requirements.