To put it plainly, we don't tend to click on banners at the best of times. When you receive the list of results, check out the banner. Unless they've changed it by the time you read this article, you should see a banner advertising some sort of Web-based wedding service. Lots and lots of targeted banner views. These programs display your banners on other Web sites in return for your displaying their banner on yours.
Some ratios are better than others, so it's worth checking out a few of the different programs.
Most of the exchanges require your graphic to be of a certain size, in GIF format, and under 10K. Most accept animated GIFs, as long as they are under the 10K limit. Something to look out for when choosing an exchange is whether you can choose what sort of banners are shown on your site. If you own a kid-themed site, you don't want to be showing 'adult' banners. For example, if you have an entertainment site, choose to show your banner on other entertainment sites. Well the title explains it all.