Functions as a Services
Or
Cloud Computing
AWS Lamda vs Firebase functions
https://cloudacademy.com/blog/google-cloud-functions-serverless/
https://cloudplatform.googleblog.com/2017/09/why-we-migrated-to-Firebase-and-GCP-Smash.gg.html
https://dzone.com/articles/introducing-functions-as-a-service-faas?fromrel=true