Google’s content network
Many people that manage Pay per click campaigns are aware that Google’s content network has a significantly lower quality of conversions than their ads. However, most people don’t know that the reason for it is because that is where the majority of click-fraud occurs. If you do manage a Pay-per-click campaign, you’re better off targetting specific sites or avoiding the content network altogether. You want to have control over which sites your ad displays on because very often the quality of the sites can be quite low.
Popularity: 88% [?]