1. Query: Read operations to fetch data
2. Mutation: Write operations to modify data
3. Subscription: Real-time operations for live data updates

# Query
query GetUser {
  user(id: "123") { name }
}

# Mutation
mutation CreateUser {
  createUser(input: { name: "John" }) {
    id
    name
  }
}

# Subscription
subscription UserUpdates {
  userUpdated(id: "123") {
    name
    status
  }
}