This tutorial teaches how to build a serverless GraphQL service on the edge with Cloudflare Workers and Fauna — allowing you to take advantage of two edge serverless compatible technologies. Edge serverless is an infrastructural evolution of cloud serverless where computing resources are located geographically closer to the end user, reducing latency. By default, Fauna is a serverless database with edge support, distributed across different servers within a specified region group, and can be used as the database for this GraphQL service. The tutorial covers setting up a new Cloudflare Workers project, creating a simple GraphQL server with @graphql-yoga library, replacing the schema with CRUD operations, implementing resolvers using Fauna's client, adding a subscription function to listen to real-time database changes, and provides a live demo and complete code for this demo.