Update BuildingAChainlitApp.md

BuildingAChainlitApp.md

@@ -105,6 +105,12 @@ Notice a few things:
 
 Why do we want to support streaming? What about streaming is important, or useful?
 
+
+#### Question #1 Answer:
+
+Streaming the response allows the user to see the response being generated contemporaneously. I suppose it's a better UX as users don't have to wait for the entire response to be loaded in.
+
+
 ## On Chat Start:
 
 The next scope is where "the magic happens". On Chat Start is when a user begins a chat session. This will happen whenever a user opens a new chat window, or refreshes an existing chat window.
@@ -138,6 +144,9 @@ NOTE: Chainlit has some great documentation about User Session.
 
 Why are we using User Session here? What about Python makes us need to use this? Why not just store everything in a global variable?
 
+#### Question #2 Answer:
+
+The reason we use user session is so that the chats that we are having are stored directly within the current session and if we start a new chat we can clear the current session and begin a new one - aka a new version, which is defined at the on_start level.
 ## On Message
 
 First, we load our chain from the user session: