[GraphQL Playground](https://github.com/prismagraphql/graphql-playground) is a graphical interactive in-browser GraphQL IDE, created by [Prisma](https://www.prisma.io/), based on [GraphiQL](https://github.com/graphql/graphiql). In development, Apollo Server collocates a GraphQL Playground instance with the GraphQL path. When a browser sends a request to Apollo Server, it receives GraphQL Playground. When `NODE_ENV` is set to production, introspection and Playground are disabled as a production best practice.
The Apollo Server constructor contains the ability to configure GraphQL Playground with the `playground` configuration option. The options can be found on GraphQL Playground's [documentation](https://github.com/prismagraphql/graphql-playground/#usage)