Heroku is a cloud hosting service that provides a scalable and flexible platform t to build, run, and operate applications entirely in the cloud. Developers can deploy web apps, mobile backends, and APIs with a single command.. It has two components: the Heroku backend for running the application, and the Heroku frontend for accessing it.
It is developed in Ruby on Rails, Node.js, and Java. Heroku was originally created by James Lindenbaum and Adam Wiggins in 2007 and acquired by Salesforce.com in 2010.

Cloud hosting services are becoming more popular as they offer many benefits to developers, including the ability to scale up or down based on demand, speed of deployment, and easy access to resources.