Embark on a comprehensive video tutorial to build a full-stack project management system using GraphQL, Express, MongoDB, React, and Apollo. Learn to create an Express server, set up GraphQL, design schemas, and implement client and project types with queries. Explore making queries with GraphiQL, establish project-client relationships, and connect to a MongoDB database. Master Mongoose models, data fetching, and mutations for both clients and projects. Dive into client-side development with React, set up Apollo, and implement CRUD operations for clients and projects. Discover how to handle Apollo cache, set up React Router, create forms for adding and editing projects, and implement cascade delete functionality. By the end of this tutorial, gain practical experience in developing a complete MERN stack application with GraphQL integration.