Ad space is a common affiliate marketing term referring to the part of a website dedicated to advertisements. For those websites whose number 1 revenue method is online advertising, ad space is a crucial component. It needs to be attractive to the advertisers, while not alienating the website visitors. For that reason, the job of web designers is to find the golden ratio between the two factors.In most cases, the area of a website used for ad space is the part of the top and the bottom, where promotional banners could fit nicely. On top of that, some publishers also use the space on the side, allowing larger skyscraper ads. The pricing of an ad space depends on its size, but also on other factors, most notably the hourly traffic of the website.