In the real world, billboards provide prominent, consistent visual messages to passing traffic. For Web surfers, online display advertising does the same thing, which makes it one of the most effective tools for building awareness with your audience.
Fortunately for advertisers, banner ads and other online ads can be targeted to a more specific audience. That means less impressions are wasted on uninterested viewers, and more efficient use of your media dollars. And thanks to the growth of the Internet, the number of sites that can serve as a vehicle for your message continues to grow.