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Credit to Author: Louise Matsakis| Date: Tue, 20 Aug 2019 21:56:51 +0000<\/strong><\/p>\n By default, Facebook <\/span>tracks what you do even when you\u2019re not on Facebook, like the products you shop for, the political candidates<\/a> you donate to, and the porn you watch<\/a>, using tools like Facebook Pixel, a small piece of code deposited on millions of websites<\/a> across the internet. The social network uses that information to target you with personalized ads\u2014a business model that is now worth billions of dollars.<\/p>\n But that model has also come under increased scrutiny as privacy advocates, lawmakers, and pundits continue to question why anyone should trust<\/a> Facebook with their data. In the aftermath of the Cambridge Analytica scandal<\/a> last year, Facebook promised<\/a> that users would soon have more control over their information using a \u201cClear History\u201d tool, which would delete people\u2019s off-platform browsing records. More than a year later, the company finally announced Monday<\/a> it\u2019s rolling out the feature, now called \u201cOff-Facebook Activity.\u201d People in Ireland, South Korea, and Spain will have access to the long-anticipated<\/a> tool first, and it will be rolled out in the coming months to all Facebook users.<\/p>\n Off-Facebook Activity will give you a summary of the third-party websites and apps that share your visit history with Facebook, and will allow you to clear them. You can also choose not to allow Facebook to use your browsing history for personalized advertising in the future, including on Messenger and Instagram. Erin Egan, Facebook\u2019s chief privacy officer, and David Baser, the director of product management, noted in a blog post<\/a> that the new tool \u201ccould have some impact\u201d on Facebook\u2019s business, but that \u201cgiving people control over their data is more important.\u201d<\/p>\n But not complete control. Even if you turn off Facebook\u2019s ability to use your browsing history for ads, Facebook will still collect that information, and it will still be connected to your account for up to two days. Buried in a Help Center post<\/a> behind a drop-down menu, Facebook clarifies: \u201cYour future off-Facebook activity will be disconnected within 48 hours from when it's received. During this time it may be used for measurement purposes and to make improvements to our ads systems.\u201d<\/p>\n In an email, Jay Nancarrow, Facebook\u2019s director of policy communications, said that Facebook will notify users of this 48-hour period when they access the\u201cManage Future Activity\u201d portion of the tool in their settings. He also noted that the caveat was included in an engineering blog post<\/a> Facebook published Monday explaining how Off-Facebook Activity was built.<\/p>\n Even after 48 hours, the Off-Facebook Activity controls won\u2019t actually delete<\/em> your browsing data from Facebook\u2019s servers. It merely decouples the information from your personal profile. Your data will still show up in aggregated contexts. \u201cThis way, we can do things like give advertisers reports on the effectiveness of their ad campaigns or give businesses aggregated site and analytics reports, such as how many women between the ages of 18 and 24 use their apps,\u201d Nancarrow said. And Facebook needs the 48-hour window in order to compile this kind of information. In a blog post<\/a> aimed at clients published in May, Facebook reassured advertisers it would \u201cstill be able to provide accurate measurement,\u201d in order to help businesses grasp \u201cthe impact of their Facebook investment.\u201d<\/p>\n \u201cFacebook is essentially saying, \u2018We\u2019re just going to remove the link between your unique Facebook account and this big stream of data, but we\u2019re going to keep that big stream of data,\u2019\u201d said Aaron Rieke, the managing director of Upturn, a nonprofit research group that has studied<\/a> Facebook\u2019s advertising practices.<\/p>\n Facebook says it\u2019s choosing to decouple your data instead of deleting it not just for business reasons but also technical ones. In its technical blog post<\/a> laying out how the new tool was built, Facebook\u2019s engineers explained that the company stores user information across various scattered databases, rather than in one centralized location. Because deleting data across them all might not work reliably, Facebook chose instead to \u201cdisconnect it directly from a person\u2019s account.\u201d Facebook says it believes the tool is unprecedented, meaning there was no roadmap it could follow to build the feature.<\/p>\n If a sizable portion of Facebook users disconnect their browsing data, that might hurt the company\u2019s business, as Egan and Baser noted. It could make Facebook\u2019s ads less effective, at least in the long run, and potentially lower their value.<\/p>\n But for the new tool to actually affect Facebook\u2019s bottom line, consumers will have to elect to use it in large numbers. The Pew Research Center found in a study<\/a> published earlier this year that the vast majority of Facebook users in the US don\u2019t know about the menu where they can change other preexisting privacy settings related to advertising. Facebook CEO Mark Zuckerberg admitted just as much when he testified before the Senate last year. \u201cSome people use it. It\u2019s not the majority of people on Facebook,\u201d he said. The social network likely expects the same will be true for the new Off-Facebook Activity tool, too.<\/p>\n \u201cI think the practice of targeting people by their web behavior will remain a strong and viable way to do business,\u201d Rieke said.<\/p>\n