Online advertising

The online trackers used by advertising companies may be a thing of the past.

A wireless Internet-connected device that can block any TV ads -- will it change television?

Advertising fraud now comes in video form.

As fall clothing lines roll out, advertising in fashion magazines ramps up, too.

Content providers -- like Disney or Fox -- are now asking companies delivering online ads -- the Googles of the world -- to stop working with websites that allow illegal file sharing.

Facebook apologizes for offensive content and advertisers have pulled out. How can advertisers really know where their ads are going?

GM and Mountain Dew have pulled ads perceived to be racist. Were the ads the result of pressure to make a big viral splash, or of weak vetting for digital ads?

More people than ever can go online from their phones and tablets, but advertising hasn't caught up.

Demand for the 15- and 30-second spots that automatically play before online videos are sold out in some markets or being auctioned off at record prices in others.

An estimated 45,000 people in the U.S. may have trouble getting online Monday because of a computer virus. Hackers replaced real ads with fake ones, a crime known as "click fraud."