Facebook tests targeted advertising on News Feed The targeted system, Facebook Exchange (FBX), was introduced last year as a way for businesses to show adverts that are most likely to be relevant to potential customers according to their browsing interests. Earlier this month Facebook rolled out an overhaul of the feed in an effort to get users to spend more time and the site, and to get advertisers to spend more money. The overhaul gives users gives members more control over what status updates, news stories and other postings they are shown by splitting the all-in-one News Feed into categories. The targeted News Feed adverts will initially be available only on desktops but not on smartphones and tablets. Desktop is more in line with what FBX has been doing effectively in the right hand side. And we also find that desktop is the place where more people convert from seeing direct-response ads," Facebook spokeswoman Elisabeth Diana said. A study last year by Pew Research Center said that 68 per cent of internet users disapprove of targeted advertising because they don't like having their online behaviour tracked and analysed.