An ad banner is an ad on the Web that links to an advertiser's site or a buffer page.
Banners are the most common type of Web ad, and they come in a wide variety of sizes.
Yes, before you do any online advertising, you definitely need to have a Web site. An ad banner needs a destination or a URL to a Web site once a user clicks on it. If you need a Web site, you have two options. One option is to become an EarthLink member. Membership includes a free 6MB Web site with your account.