Normally used for site development. If planned early, you can use print prepared marine grade plywood to minimise overall cost of hoardings.
However most clients prefer to arrange a perimeter hoarding of marine plywood and then look at arranging display images. Generally, clients require sheets of pre-printed panels which can then be screwed over the wooden hoardings often having strips of header and footer panels to produce a neat finish to the overall display.
Cost will be dependent upon the substrate materials used – Corex, PVC or aluminium composite as well as any choice of over laminate – matt/gloss/ant-graffiti.