Someone hijacked Yahoo's ad servers to infect users' computers with malicious software.
Customers, and advertisers, are increasingly turning to digital video.
People laughed at Snapchat founder Evan Spiegel for turning down a $3 billion offer from Facebook. They shouldn't have.
Who tracks the trackers? You can, with Mozilla's new tool.
And it involves using Microsoft's Kinect sensor to make you buy more Oreos.
Online ads don't generate very much revenue. That's a positive sign for news consumers even if it's bad for producers.
Some users have complained about push notifications from advertisers like Dropbox.
The future of advertising is now.