Rails is a Ruby-based MVC framework that provides features like database migrations, ActiveRecord (ORM), and allows developers to build applications in minimal time. It shares similarities with Django but allows for more control over the controller-specific logic. Developers can leverage existing gems created by the Rails community to improve their developer experience. Contentful provides several gems that make interacting with its API easier, including the Contentful gem and Rich_text_renderer gem. To demonstrate how Contentful integrates with Rails, a demo job listing application is built that relies on Contentful for its data. The application uses the Contentful UI to create a content model, adds fields to it, creates entries within the model, and retrieves data using the Content Delivery API (CDA). A service object is created to store business logic, and a controller is generated to display the job listings. The Rails server is started, and the TailwindCSS classes are generated, resulting in a working application that displays a list of available jobs on the default page.