This tutorial outlines how to build a JSON RESTful API using Neo4j, PHP, and OpenAPI. It starts by setting up Neo4j AuraDB, a managed cloud solution with automatic backups, high availability, and scaling built-in. The author then installs the Slim framework, creates a controller for managing users, and defines routes for CRUD operations. The API uses Cypher queries to interact with the graph database. The tutorial also covers advanced topics such as relationships, idempotency, and querying relationship distance. Throughout the process, the author emphasizes the simplicity and ease of use of this technology stack.