The tutorial provider for this course is not specified in the given information. Without details about the source, it's not possible to write an accurate paragraph about the tutorial provider.
GraphQL API Design is the focus of this tutorial. GraphQL is a query language and runtime for APIs that allows clients to request exactly the data they need, making it an efficient and flexible alternative to traditional REST APIs. This course likely covers best practices in designing GraphQL schemas, resolvers, and queries to create robust and scalable APIs.