A good banner in the right place can generate substantial business. There are two main ways to get other pages to display your banner. The first is to join a banner exchange. This is a site that will place your banner on other sites, in exchange for you placing banners on yours. This can be a cheap way to promote your site, but has it's drawbacks.
Many people find banners annoying.
Having banners on your page may drive them away before they even take a look at what you have to offer. A banner may clash with the look or layout of your site, making it appear unprofessional. You may have only limited control over what banners appear on your site. This could mean banners advertising rival businesses or products may appear on your page The other option is to pay a site to display your banner. This can be expensive, so be careful to select a site that has high traffic and, more importantly, appeals to your target audience.