Advertising , either by selling space on your own site or by purchasing space from another is the time-tested strategy.
It is familiar and proven to be fairly effective. Recently, however, many Web surfers have begun to ignore advertisements and banner ads even more than they ignore traditional television commercials.
The advertising business model tends to make a Web site much like a television show that has intermittent commercials that help pay for its free services, rather than a cutting-edge, utilitarian site. Depending on your niche, advertisements can have a negative effect on your site, especially because many Web users have programs designed to stop cookies and banner ads automatically.