Heroku is a cloud platform as a service (PaaS) that simplifies the deployment, management, and scaling of applications. Initially launched in 2007, it supports multiple programming languages, including Ruby, Python, Java, and PHP, making it versatile for developers. Heroku utilizes container-based architecture, where applications run in isolated environments called “dynos.” This allows for easy scaling and management of resources. With both free and paid tiers, Heroku caters to a wide range of users, from hobbyists to large enterprises, providing an elegant and user-friendly interface for deploying modern applications efficiently.