There is so much choice in this area of signage depending on your requirements and budget. Exhibition signage would include Roll up banners, Illuminated Banners and Pop up Displays.
By far the most popular is the Roll up banner because it is relatively inexpensive, it’s really lightweight and portable.
Also becoming really popular is the illuminated banner, this can be printed double sided or 2 or more can be placed side by side and also available in this range is an illuminated counter stand which is very impressive.

The appeal here is that the graphics can easily be changed and reused as advertising needs change.