How effective is online advertising (discounting natural SERP as a form) within your daily life? Do all those pop ups, banner ads, sponsored search results, email ads, flash ads, etc. etc., really do anything to make you into a converted customer? Come to think of it, I spend a lot of time on the net between work and home, and I have never purchased something as a direct result of an unsolicited online advertisement. However, I think the idea here is not conversion rates. Companies keep intense online ad campaigns because of the rediculousy cheap cost per impression rate in comparison to TV and radio. .. must be doing something for them in regard to profitibility.