title: What is the purpose of Flask's context stacks?
body: <p>I've been using the request/application context for some time without fully understanding how it works or why it was designed the way it was. What is the purpose of the "stack" when it comes to the request or application context? Are these two separate stacks, or are they both part of one stack? Is the request context pushed onto a stack, or is it a stack itself? Am I able to push/pop multiple contexts on top of eachother? If so, why would I want to do that?</p>
  
  <p>Sorry for all the questions, but I'm still confused after reading the documentation for Request Context and Application Context.</p>