What fundamental property of ads makes them different from content? Maybe ads are a type of content. http://www.baekdal.com/publishing/why-traditional-ads-wor

What fundamental property of ads makes them different from content? Maybe ads are a type of content. http://www.baekdal.com/publishing/why-traditional-ads-work-and-digital-ads-dont http://www.baekdal.com/publishing/why-traditional-ads-work-a...