Facebook does use cookies if you don’t have an account or have logged out of your account. For example, we use cookies to help:

• Identify and disable the accounts of spammers
• Recover your account if you ever lose access to it
• Provide extra security features like login notifications and login approvals
• Prevent people who are underage from signing up with a false birth date
• Enable us to deliver, evaluate and understand the ads we serve
• Identify public computers so that we can discourage people from using Keep me logged in and putting their account at risk

We may also use anonymized or aggregated information to improve our products.

We also set cookies if you don’t have a Facebook account but have visited facebook.com to help us protect Facebook and the people who use it from malicious activity. For example, these cookies help us detect and prevent denial-of-service attacks and the mass creation of fake accounts.

If you have cookies on your browser or device, we read that cookie when you visit a site with a social plugin. Learn more by visiting our Data Use Policy.

As our Data Use Policy indicates, we use cookies to show you ads on and off Facebook. We don't use cookies to create a profile of your browsing behavior on third-party sites to show you ads. However, we may use anonymous or aggregate data to improve ads generally and study, develop or test new and existing products or services.