Some restrictions may apply, such as size and animation, and generally a link back to the service is required. Banner designers are experienced at creating ads that are eye-appealing and effective. Once your banner is complete you will need to decide where to have it be seen, and how much you are willing to pay. These services place your banner on other websites, for free. Basically, you show their banner and they show yours.
Ratios vary by service and extra impressions can usually be bought.
A downside to many banner exchange services is the lack of pinpointing your targeted audience, although there are some exchanges that do target, to ensure a more interested group sees your ad. Swap For Banner Space. One way to get your banner shown on other websites is to create your own exchange. Certainly you can seek out other webmasters willing to trade banners, but also consider swapping your products and services for ad space on other sites. Be creative, the possibilities are endless.