“These ads take into account people’s browsing behavior outside Facebook, as captured through cookies, with the aim of offering up messages about products they’ve already shown interest in,” writes Jennifer Van Grove of CNET.
Personalized advertising based on one’s Web browsing isn’t new, but this marks the first time Facebook has allowed advertisers to market their products directly on News Feed. (Prior to Tuesday, advertisers were only permitted to display these ads on the rightsize column of the site.)
As Van Grove notes, these types of ads are extremely valuable to merchants; they know that the products they’re pushing are the same ones you’ve been browsing and they can determine, with precision, whether you follow the link and make the purchase.
The tricky part for Facebook though, is not further alienating its users. Van Grove, and the analyst she quotes, use words like “creepy” and “jarring” to describe the feeling that consumers might have as they come upon their ad-augmented News Feed.