OpenShift 3, an open-source PaaS platform by Red Hat, offers a comprehensive environment for running applications using Docker and Kubernetes, facilitating the deployment of applications with minimal effort. The text provides a step-by-step guide to getting started with Couchbase on OpenShift 3, including downloading and configuring the necessary tools like the Vagrant box and OpenShift client, setting up virtual machines, and deploying a new Couchbase instance. By using the Docker image "arungupta/couchbase," users can configure the Couchbase server with essential parameters such as memory quota, service credentials, and a sample bucket for querying data. The guide also covers basic operations like verifying deployment status, managing pods, and querying the Couchbase sample bucket using the Couchbase Query CLI, promising further tutorials on deploying applications, scaling, and making applications accessible outside of OpenShift.