The news that Google will be disabling tracking cookies in Chrome is the smallest tip of a very complex story about internet advertsing. This long article on digital video adevrtising is the rest of it. A complex advertising ecosystem has emerged; this article describes all the standards, the players, the market (mostly US), and the technology. You may be overwhelmed, but it's worth keeping around as a reference. You can be sure some or (probably) all of this technology will inform educational content design and delivery in the longer term. "Welcome to the new world of data-driven, addressable, accountable, and increasingly automated television where audience is as important as content and context... differentiated programming/content is becoming a critical competitive advantage."