title: Do I need MongoDB Atlas if I have Heroku?
body: <p>Can someone explain me why we need the Atlas?
  If I have Heroku which gives an easier access to cloud (PaaS), then why we need MongoDB Atlas?
  Some sources say that we can connect Heroku with Atlas, but why we need that? And can please someone explain me the difference, because it seems I do not understand it completely.</p>
  <p>Will be very thankful to everyone. Articles will also be good.</p>