“AWS Lambda is a compute service that lets you run code without provisioning or managing servers. AWS Lambda executes your code only when needed and scales automatically, from a few requests per day to thousands per second. You pay only for the compute time you consume – there is no charge when your code is not running. With AWS Lambda, you can run code for virtually any type of application or backend service – all with zero administration. ”
Below is a 3 minutes pretty simple explanation of AWS Lamba. You leverage it for building some microservices and backend solutions.
By the way, if you are planing to pass the AWS Certified Solutions Architect certification, check the video below
More links
http://docs.aws.amazon.com/lambda/latest/dg/welcome.html
PATRICK 