Because CentralAd is performing the re-direction, it can track how many people have clicked on your ad. The percentage of readers who click on your ad is called the click-through rate. This information is available to you on your password-protected statistics page . A banner ad is just a graphic in .GIF or JPEG format. If you have an in-house art department or contract advertising agency, they can produce the banner for you.
Animated banners are more effective at eliciting click-throughs.
You can design animated banners in any graphics program and assemble them using a program such as GIF Animator for Windows or GIF Builder for Macintosh . New banners should be created periodically to avoid over-exposure to the same message.