So why do we go to the effort of giving speeches? 

I think that it’s  pretty safe to say that the reason that we do this is because we want to use the importance of public speaking be remembered.  We want the words that we shared with our audience to remain in their  heads long after our speech is over and done with. This presents us with  quite a problem. All of us engage in lots of different conversations  every day and by the end of the day if you asked us to remember any of  them we would be hard pressed to remember them. 

What we need to do as  speakers is to find a way to add more flair to our next speech.