GraphQL is a query language for APIs and a runtime for fulfilling those queries with your existing data. To learn about GraphQL, one can use it by following starter projects like the one created on GitHub or exploring open source projects. Netlify provides tools and free hosting to support open source projects, including Open Sauced which aims to help developers navigate the process of contributing to open source projects. The project uses Graphcool for a serverless GraphQL backend, leveraging the `graphql-up` tool for easy deployment. It also accesses the GitHub GraphQL API to retrieve repository data, using tools like GraphiQL to view documentation and build queries. The final version is deployed on Netlify with a 1-click deploy button, allowing users to contribute to the project by submitting pull requests and issues. The project's founder, Brian Douglas, aims to create a foundation for exploring GraphQL and reducing the chance of getting lost in the open source process.