Forms of new media have also diversified how companies, brands, and ad networks serve ads to visitors.

Allow publishing sites to serve ads for multiple advertisers.

That means serving ads to a user based on his or her online behaviors as tracked by the cookie.

We use third-party advertising companies to serve ads when you visit our website.

Yes, oh so altruistic to charge instead of serving context-based ads.

The particular sequence is applied to all websites that serve ads from the same ad network.

Who cares if Google serves ads next to your search results?

This restriction is applied to all websites that serve ads from the same advertising network.

Google will pay it at least $900 million over the next three years to serve ads to the site's users.

It's not a bad idea for serving personalized ads, but if someone doesn't want to be found online this won't do much to stop them.