A GraphQL binding is a minimal, auto-generated GraphQL client for a specific GraphQL API. In this article, Abhi Ayer explains how GraphQL bindings are used for service-to-service communication at Workpop.
If you're not sure whether GraphQL is the right choice for your next project, you need to read this article! Robin Wieruch gives a great overview of the advantages and disadvantages of using GraphQL and also presents some alternatives.
This tutorial by Brandon Richey is an excellent introductory guide for Elixir/Phoenix developers that want to learn how to get started with GraphQL. Bonus points for a great structure and detailled instructions!