Every time you click on a like button on another site, you've told Facebook that you're doing that. And so therefore advertisers know who their fan base is.

In fact, the big steps forward for advertising, especially after World War I were when government just began employing the tools of advertising for its own purposes to get people to join the army and other things.

Starting with radio, starting with television, we got used to this idea of stuff being free as long as you just watch a few ads.

Advertising always corrupts the goal of the search engine, which is to try to give you the most important stuff, not the stuff someone paid there to be there.

One thing I'll say about Hitler that many people don't realize - and I don't mean to besmirch the industry - but he did get his start, not only as an artist, but as an advertising man writing art for advertisements.

We have just decided we have to have everything for free. And I think we're starting to pay for it in terms of our mental states.

We already have our phones, but other wearables, and those technologies are going to want to know when you're deciding things and then offer some kind of input subtle or less so on that moment.