Heroku is a website that provides a cloud-based platform for building, deploying, and scaling web applications. The website offers features such as containerization, automated patching, and app performance monitoring to help developers build and deploy applications quickly and efficiently.

Moreover, Heroku provides various integrations with other tools such as GitHub, Slack, and Salesforce, making it a valuable resource for developers looking to build scalable web applications. The website is a useful tool for startups, small businesses, and enterprise organizations looking to build and deploy applications with ease. With Heroku, developers can focus on building high-quality applications without worrying about infrastructure management or deployment.