While displaying your logo may be essential for print and related media promotions, the question of whether to display logos on banner ads deserves a second look.
People react differently to ads on the Web than they do to ads in other media.
Visitors usually don't want to see ads when they come to a Web site. They are expecting to find information or entertainment. One of the most ineffective banners is one that contains a logo and a company slogan. There are some times when a logo in a banner ad can be helpful. Such companies have large advertising budgets to feature their names in many places.