A death cookie, also known as a session cookie or a persistent cookie, is a type of cookie that is stored on your computer even after you close your web browser. Unlike other cookies, which are deleted when you close your browser, death cookies can remain on your computer for weeks, months, or even years. Death cookies are used by websites to track your online activity and store information about you. This information can include things like your name, address, email address, and credit card number. Death cookies can also be used to track your browsing history and the websites you visit. Most death cookies are harmless and are used for legitimate purposes such as storing your preferences or keeping you logged in to a website. However, some death cookies can be used for malicious purposes, such as stealing your personal information or tracking your online activity. If you are concerned about death cookies, you can disable them in your web browser's settings. You can also delete death cookies that have already been stored on your computer by using a cookie cleaner or privacy tool.