Larger organisations have whole departments working on the look, feel and placement of promotions.
Cyberspace can be a lonely place when you don't have anyone visiting your site. That's true for commercial online presences and personal home pages alike. If you're a hobbyist, it can be depressing and if you're in business, you'll know that advertisers can get awfully antsy about pages that rate well in the hits department. Funnily enough, you'll find the best results come not from fancy banner ads, but from free Web search engines and URL submission services. Similarly, more Web surfers will come to your page after seeing it listed on a search engine than will click through from an online ad.