AWS's serverless compute service that runs code in response to events without managing servers. It scales automatically from 0 to thousands of concurrent executions. You pay only for execution time.
On CLF-C02 this is the serverless example. SAA-C03 integrates it with API Gateway, S3, DynamoDB, SNS. Question: run code in response to a file upload to S3 without managing infrastructure → Lambda. Equivalent to Azure Functions.
AWS Lambda is a concept that can show up on the exam. Check the full guide to see it in context.