Holding an event may be a good way to help you achieve your communication goals.
You may wish to speak to and engage a large audience, for example, at an annual conference.
Large conferences usually include multiple elements with something for everyone, plenary sessions, exhibit halls, keynote speakers, and more focused and smaller working groups.
An event can serve as a unique way to engage your audience, perhaps by getting them involved in a competitive activity, such as a photo competition or long-distance run, or signing a large banner.
Events can be highly creative and leave memorable impressions, from traveling art exhibits to messages drawn by planes in the air. The limits are often only defined by your imagination (and resources).