Serverless – a method of containerised software or cloud-native development model which has developers write micro services code without getting involved with server management at all. The micro services are run on the public cloud, in so-called lambda functions in AWS, with the developer not having to startup or run a service instance. The notion of a server is abstracted away from app development. The micro services still run on servers but that is taken care of by the public cloud provider.
AWS Lambda is an event-driven compute service natively integrated with over 200 AWS services and software as a service (SaaS) applications. Find out more here.