title: The difference between Mutation and Query
body: <p>I'm reading <a href="https://graphql.org/learn/queries/" rel="noreferrer">GraphQL Docs</a> about <code>Query</code> and <code>Mutation</code>. However, there is a lack of real examples which shows the difference and most importantly — when is it appropriate to use them.</p>
  <p>Many thanks for the explanations.</p>