Why should you use AWS Lambda
AWS Lambda is a fully managed compute service which allows you to focus on delivering value, and leaves all the maintenance overhead to AWS.
What does fully managed mean in this case; A huge amount. Firstly the provisioning of servers, operating systems and runtimes. The scaling of capacity across multiple AWS availability zones. Load balancing of requests and automatic failover in case of failure. If you work in a regulated industry, AWS Lambda is SOC, HIPAA, PCI, ISO compliant.