Descriptions

We can add a description before any definition in our schema using " or """. Descriptions are included in introspection and displayed by tools like GraphiQL. Some libraries (like graphql-tools) also treat comments-lines that start with #-as descriptions, even though according to the spec they’re supposed to be ignored.

type Query {
  "have the server say hello to whomever you want!"
  hello(
    "person to say hello to"
    name: String!
  ): String
}

"""
multiline description
of the User type
"""
type User {
  id: Int
  email: String
}