Serverless computing allows code to run without provisioning or managing servers. The document discusses serverless architectures using containers and functions as a service (FaaS). It explains that with serverless, infrastructure is dynamically provisioned to run functions in response to events, then shut down after, avoiding idle resources. Serverless combines backend as a service (BaaS) and FaaS. The document provides an example of building a serverless blog service using AWS Lambda and discusses benefits like autoscaling but also challenges like vendor lock-in and cold start latency.