Those who has small and medium business for them banner advertising is best way for getting more hits, traffic and better revenue.
I am giving little bit introduction about Banner Advertising
The most popular form of advertising on the Internet's World Wide Web is currently banner advertising. A banner (graphic image) and link are displayed on a high traffic web site, in which the people visiting that site (the audience) see when the page loads. This banner commonly advertises a product, service, or just another web site. It can also be used to show someone's point of view on a certain topic (for example, a presidential election).
Benefits from Banner Advertise
Increasing site traffic: This probably the mostly likely thing that you will use banner advertising for.
To sell more of your product(s) or service(s).
To be able to notify buyers of your new product or service, or offer them a special deal/discount.
To Spread your ideas about a certain topic.
To get people to remember your company's name! (Incase they wish to have your products or services in the future!)