Heroku is a platform as a service (PaaS) that enables developers to build, run, and operate applications entirely in the cloud. Applications run inside smart containers in a fully managed runtime environment that handles configuration, orchestration, load balancing, failovers, logging, security, and more.

Heroku provides support for the most popular languages such as Ruby and Node.js, high-scale data services including Postgres, Kafka and Redis, and an add-ons ecosystem featuring over 180 cloud application services. Its benefits include fast server setup, easy deployment with Git Push, and a free tier option for beginners looking to experiment in a limited sandbox.