| 15 | 15 | Authentication |
| 16 | 16 | |
| 17 | 17 | > _For example:_ We use cookies to keep you logged in as you navigate between Facebook Pages. Cookies also help us remember your browser so you don't have to keep logging in to Facebook and so you can more easily log in to Facebook via third-party apps and websites. For example, we use the "c\_user" and "xs" cookies, including for this purpose, which have a lifespan of 365 days. |
| 18 | 18 | |
| 19 | 19 | Security, site and product integrity |
| 20 | 20 | |
| 21 | | > _For example:_ Cookies can help us identify and impose additional security measures when someone may be attempting to access a Facebook account without authorisation, for instance, by rapidly guessing different passwords. We also use cookies to store information that allows us to recover your account in the event that you forget your password or to require additional authentication if you tell us that your account has been hacked. This includes, for example, our "sb" and "dbln" cookies, which enable us to identify your browser securely. |
| 21 | > _For example:_ Cookies can help us identify and impose additional security measures when someone may be attempting to access a Facebook account without authorisation, for instance, by rapidly guessing different passwords. We also use cookies to store information that allows us to recover your account in the event that you forget your password or to require additional authentication if you tell us that your account has been hacked. This includes, for example, our "sb" and "dbln" cookies, which enable us to identify your browser securely, as well as "datr." "Datr" is a unique identifier for your browser that, amongst other things, helps us protect you from fraud. For example, it helps us identify trusted browsers where you have logged in before. "Datr" has a lifespan of two years. |
| 22 | 22 | |
| 23 | 23 | We also use cookies to combat activity that violates our policies or otherwise degrades our ability to provide the Meta Products. |
| 24 | 24 | |
| 25 | | > _For example:_ Cookies help us fight spam and phishing attacks by enabling us to identify computers that are used to create large numbers of fake Facebook accounts. We also use cookies to detect computers infected with malware and to take steps to prevent them from causing further harm. Our "csrf" cookie, for example, helps us prevent cross-site request forgery attacks. Cookies also help us prevent underage people from registering for Facebook accounts. |
| 25 | > _For example:_ Cookies help us fight spam and phishing attacks by enabling us to identify computers that are used to create large numbers of fake Facebook accounts. We also use cookies to detect computers infected with malware and to take steps to prevent them from causing further harm. Our "csrf" cookie, for example, helps us prevent cross-site request forgery attacks. The "datr" cookie also helps us to identify the browsers used by malicious actors and to prevent cyber-security attacks, such as a denial of service attack that could prevent you from accessing the Meta Products. Cookies also help us prevent underage people from registering for Facebook accounts. |
| 26 | 26 | |
| 27 | 27 | Advertising, recommendations, insights and measurement |
| 28 | 28 | |
| 29 | 29 | > _For example:_ Cookies allow us to help deliver ads to people who have previously visited a business's website, purchased its products or used its apps and to recommend products and services based on that activity. Cookies also allow us to limit the number of times that you see an ad so you don't see the same ad over and over again. For example, the "fr" cookie is used to deliver, measure and improve the relevancy of ads, with a lifespan of 90 days. |
| 30 | 30 | |
| 31 | 31 | We also use cookies to help measure the performance of ad campaigns for businesses that use the Meta Products. |