The article provides a comprehensive guide on how to integrate PostgreSQL with Strapi, an open-source headless CMS based on Node.js. Initially, it introduces Strapi's default database, SQLite, and explains how to configure it to work with other databases like PostgreSQL. The author walks through the steps to set up a Strapi project, install necessary dependencies, and change configurations to connect to a PostgreSQL database. The article then illustrates building a bank application using Strapi, displaying how to create collections for accounts and transactions, and implementing business logic for transferring money between accounts via custom API endpoints. The author also covers creating a frontend using Next.js to interact with the Strapi backend, highlighting the ease of integrating PostgreSQL into Strapi projects and the platform's flexibility and configurability. The piece concludes by encouraging developers to consider Strapi for their projects due to its straightforward setup and robust features.