George Carlin's great (and funny) example of why 85% of the words that come out of a person's mouth, especially at a meeting where someone is trying to sell something, mean nothing at all. You have no idea what he is talking about or what it means, but it sounds really impressive, even though it is completely contradictory and meaningless.
People are always trying to use more words, probably because they want to be sure they never miss any topics - like a shotgun wounding innocent bystanders. If someone is uninterested in the main thrust of what you came to say, what does it matter if they miss some of the side notes?