The GitHub GraphQL API is a powerful tool that provides access to data on GitHub repositories, users, issues, and more. Apollo Studio Explorer is a useful tool for testing and running queries on the GitHub API. To use Apollo Studio Explorer with the GitHub API, you need a personal access token and authentication. The token is used to authenticate requests to the GraphQL API, allowing you to build and run queries to retrieve data such as repository names, stars, and open issues. Building these queries requires selecting relevant fields from the API, including `viewer`, `repositories`, `stargazerCount`, `issues`, and more. Once built, queries can be run in Apollo Studio Explorer to test their functionality and retrieve data. With this tutorial, users can become familiar with building queries and using Apollo Studio Explorer to take full advantage of the GitHub GraphQL API.