If you attend trade shows, then you will know all about display design.
As with all other marketing material its about standing out from the crowd. A good display (large posters, pull up banners, colour schemes) will do just that for you and help you make the most of the price you have to pay for a stand.
Yuranga can design, source and print your display materials. Either let us know what you need, or have a chat with one of our designers to get some ideas.