Pauses are very important because if you don't pause then your sentence just keeps going on and on and never ends. When you pause it gives the listener time to take in what you just said other than not pausing and them having to keep listening and not taking in what you said. The purpose is so that the reader can take in what your saying
A pause can be used to give emphasis to a certain point. The pauses can also be used to single out a certain sentence and those sentences are what later get quoted in newspaper articles or people what people use to refer to the speech in question.
