Leosghost - 7:41 pm on Sep 3, 2012 (gmt 0)
One which has absolutely no call to action, no product offered, and in some cases there is no text merely a photo or a graphic with the logo..
I have even seen photos of totally nondescript corners of factory rooms with no logo, no explanation and no markings to say that it is an ad...only "on hover" and only looking at the status bar or actually clicking through can one tell it is an ad and not part of the images on the page..
I have a collection of screen caps of some of them ( I cap less than 5% of them, I nevertheless have 100s from the last year alone ;-)..most of them are totally irrelevant to the sites they were on ( not mine )..and are ads from companies whose sites I have never been on..
A "classic example" ( of totally unrelated, and non personalised ads ) would be the "belly fat" ads ( although these are not CPM "branding", but they definitely are "scattergun" ;-)..they are less prevalent than they were, but still around, and for example, I have seen them on "el reg", when the article I've been reading was not about tech ( the subject of the register ), but not sufficiently well "focused" to pull in subject related ads..