Definition - What does Heroku mean?
Heorku is Platform as a Service (Paas) cloud offering that provisions the development of Web applications and services. It is a cloud application development platform that provides development tools, scalable processing power and cloud management functionality. Heroku was initially developed for Ruby on Rails and now support various other development languages.
Techopedia explains Heroku
Heroku also comes with various add-on services that enable developers to integrate third-party solutions within the program's architecture for various services including database, monitoring, email, billing and many others.