title: What´s a Symfony worker?
body: <p>I heard talk about "workers" in a refactor of a Symfony application. I have was searching this term (in Google and <a href="https://symfony.com" rel="nofollow noreferrer">Symfony</a> official site) but I found nothing. </p>
  
  <p><strong><em>Symfony workers</em></strong> exists as a component or part of this framework? 
  is a real concept or not?</p>