Using logos in banner designs

People react to ads differently on the web than other types of media. A logo design in a banner usually screams "advertisement" to the audience, and web pages are already oversaturated with banner ads. Visitors usually don't want to see ads when they come to a web site. Visitors are expecting to find information or entertainment.

One of the most ineffective banners is one that contains a logo and a company slogan. How does that banner ad benefit your audience? What reason does the viewer have to click on to your site? None! You've just said in your banner "look how good I am" rather than thinking "look what good I can do for you."