Third-party cookies are cookies placed by whom?

• A. Cookies placed by the site you're visiting
• B. Cookies placed by someone other than the site you're visiting; they can also be used by advertiser networks that share your interest in whatever is discussed on that site with marketers
• C. Cookies stored by the browser for offline use
• D. Cookies that are always deleted after a session

Answer: (B)

Third-party cookies are cookies set by a domain other than the one you’re visiting. They’re typically placed by advertisers or analytics networks that embed ads or widgets from their own domains on the page. Because the cookie comes from a different site than the one you loaded, these cookies can track your activity across many sites that use the same third-party service, helping marketers build a profile for targeted advertising. This is why this type of cookie is described as being placed by someone other than the site you’re visiting and used by advertiser networks to share interest data with marketers. In contrast, cookies placed by the site you’re visiting are first-party cookies and are commonly used for things like keeping you logged in or saving your preferences.