Facebook
has announced that it's to start using app and website data from your
browsing habits to provide more targeted ads—and you'll have to opt out
if you don't like it.
More..
The
feature, which will hit Facebook accounts in the coming weeks, will
provide advertisers with the information required to target Facebook ads
more directly. That already happens elsewhere across the internet, but
Facebook's previously never used the data in this way. So, look at a new
product online—say, a TV or pair of shoes—and you can expect to seem
them on your blue feed.