Drive in any major city in America, or even along some less populated side roads, and you're bound to encounter several billboard advertisements. These are often produced on large rectangle boards. The most common sizes are 14″ × 48″, 12″ × 24″, and 5″ × 11″. However, there are many variations.

In addition, advertising that you see at bus shelters, subway stops, shopping malls, and other places frequented by the general public can also be considered billboards.

Billboard advertising is most suited to businesses that have a broad customer base, such as car dealerships, pharmacies, and major retail stores. This type of advertising is used to reach as many potential customers as possible. And what better way than to catch them while driving or walking somewhere!

The most important thing to consider when writing a billboard ad is that people are usually moving past it — trying to get somewhere. So you only have time to persuade them with a few words at most. That's why a captivating headline and strong supporting visual is so important. Body copy is rarely used.

The objective of a billboard ad is to get people to remember the product or service. You want to make a lasting impression, typically with a strong enticing benefit. For example: “Kids Eat Free At Danny's Pizzeria!”