it is in literature or music or public speaking, keynote is all about establishing the main underlying theme. A keynote speaker is one of the most highly paid orators in public or corporate meetings, and most often they are also the misunderstood ones as well.
Any individual who has good diction, social skills and communication skills can become an efficient Keynote speaker. The main job of the orator is to inspire and stimulate spectators gathered at the event.
It has become quite a trend now to hire speakers for the promotion of the products of a specific firm, agency or industry. And it is a very effective method since an increase in the sales of products has been seen after hiring such speakers.