Android 4.4.3 update, dialer add 2 second pause - what is it? THe new dialer for android 4.4.3 has an option for "add 2 second pause" and "add wait". What do these options do?

I'll add a screenshot soon.
It adds a delay to the buttons you dial when it is dialing. It is for interactive request on the phone (E.g. Press 1 to speak to RossC) 

Here's an example that might explain it:

Say you do the following to top up your phone credit:


  Dial 1741
  
  Select option 1 for top up
  
  Select Option 2 for enter code
  
  Enter 20 digit code (XXXXXXXXXX-XXXXXXXXXX)


You could simply dial:

1741 &lt;ADD 2 SECOND PAUSE&gt; 1 &lt;ADD 2 SECOND PAUSE&gt; 2 &lt;ADD 2 SECOND PAUSE&gt; XXXXXXXXXXXXXXXXXXX  and it will all process. It literally adds a pause of 2 seconds to the buttons it dials!

My ancient Nokia phone used to have a 'P' for this above the # key. So you would have had 1741 P 1 p 2 etc on it. Very convenient for something you regularly call.