
Overall, Facebook-home-page ads on average generated a 10% increase in ad recall, a 4% increase in brand awareness and a 2% increase in purchase intent among users who saw them compared with a control group with similar demographics or characteristics who didn’t.
Purchase intent was 2% higher among viewers of home-page ads vs. nonviewers, but increased to 8% either when ads appeared alongside organic mentions of the brand in the news feed.
Of the 18 million users exposed to the ads, only around 130,000, or less than 1%, “engaged” with them by clicking on them. But around 40,000, or around 4%, of users who saw organic mentions of their friends become brand fans clicked on those news items.