Facebook Rolls Out Tool To Block Off-Facebook Data Gathering

Soon, you could get fewer familiar ads following you around the internet — or at least on Facebook.

Facebook is launching a long-promised tool that lets you limit what the social network can gather about you on outside websites and apps.

The company said that it is adding a section where you can see the activity that Facebook tracks outside its service via its “like” buttons and other means. You can choose to turn off the track; otherwise, tracking will continue the same way it has been.

Formerly known as “clear history,” the tool will now go by the slightly clunkier moniker “off-Facebook activity.” The feature launches in South Korea, Ireland and Spain, consistent with Facebook’s tendency to launch features in smaller markets first. The company did not give a timeline for when it might expand it to the U.S. and other countries, only that it will be in the “coming months.”

What you do off Facebook is among the many pieces of information that Facebook uses to target ads to people. Blocking the tracking could mean fewer ads that seem familiar — for example, for a pair of shoes you decided not to buy, or a nonprofit you donated money to. But it won’t change the actual number of ads you’ll see on Facebook. Nor will it change how your actions on Facebook are used to show you ads.