It can describe your product or service. It can show your product or service. It can explain what makes your product or service superior. It can mention your company's phone number and address so people can contact you for business. It can contain a direct link to your website.
People love to collect screensavers.
They love to pass them to their friends. They will look at the screensaver and notice your business information. One of the best ways to do so is to sponsor a particular subject and use pictures and photographs of that subject in your screensaver. If your company is based in New York, create a New York sights screensaver. If your company sells bottled water, develop a screensaver with scenery from the springs and mountains from where the water is collected.