title: Google PubSub Pull vs Streaming Pull differences
body: <p>I was reading the <a href="https://cloud.google.com/pubsub/docs/pull#streamingpull" rel="noreferrer">documentation</a> from Google about pull vs streaming pull but could not quite get it. Can someone explain to me the difference and also would be helpful if someone has implemented it and could point me to the resources. 
  Many thanks.</p>