Do you want your poster or leaflet to stand out?
Events and products often need and deserve posters/leaflets to get their message out to the public, or a desired audience. It's important for your designer to understand that audience and cater to what their tastes may be for maximum effect. The message you want to put out need to be clear. This is done with either or both of the following: a very strong understanding and use of the psychology of typography, and/or eye catching imagery that speaks the message visually.
During the last 25 years I have created literally hundreds of posters and leaflets in a huge variety of messages, from retail to the care industry, from conservation to event promotion.