It is a given that billboard advertising "outdoor" is not a "quick fix". If sales are down, you can't quickly put up a few boards to boost the numbers. You must plan ahead.
Lead time is not short when using outdoor. The best use of boards is for image building and brand awareness.
Billboards are not cost effective for one time only sales or non-repeating special events. Most billboards are sold for a minimum of one month.
Using billboards is akin to TV, it can mean you have "arrived" as a formidable business.Billboards are image builders.
Painted billboards (Paints) are the oldest form of outdoor advertising. Poster Boards (Paper) may be the best known. We have all seen the billboard guy hanging off the ladder with the swirling wallpaper-like panels being pushed into place with the big glue broom.
All the rage now is the use of vinyl on boards. This allows for better color, longer life and very fine graphics. Vinyls are printed with a special printer, not unlike your computer printer (but bigger).
Bulletins are the giant boards you often see along Interstates. They can be as big as 20 x 60 feet.
Here are BIG Mike