title: Erlang - Elixir: What is a supervision tree?
body: <p>I'm doing a tutorial and it says "In this guide, we will learn how to build a complete Elixir application, with its own <strong>supervision tree,</strong> configuration, tests and more".</p>
  
  <p>In plain english, what is a supervision tree in Elixir? </p>
  
  <p>Thanks!</p>