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By 2020, AWS Lambda had more than 100,000 active users each month, conducts trillions of monthly executions, and supports 22 global regions. The migration to serverless architecture by the biggest players like Netflix, the New York Times, and A Cloud Guru brought them significant benefits. Together with DynamoDB, Amazon S3, and Amazon Cognito, Lambda helps them build a website or an application without managing servers and operating systems. Customers do not pay for code storage but only for the execution of functions — thus, they will be billed only when an image has been resized.