A cookie's contents are determined by the specific website that created that cookie. Contents vary from site to site. As a general rule, cookies contain random alphanumeric text characters.
Cookies are intended to help you access a site faster and more efficiently. For example, cookies can store information to help you enter a site without having to login. In effect, cookies tell the website that your browser has been to the site before. It does not need to know your exact identity. To find out more about this function, please check out the manage cookies section
When created, cookies normally don't contain any personal information. They don't scan your computer or do any kind of investigation to find out your personal information. Any personal information they might contain is a result of your own input on a website's form. Most of the time, when a cookie does store personal information, this information is coded in such a way that it is unreadable to any third party who happens to access your cookie folder. The only computer that can read and decode the information is the server that created the cookie in the first place.
In addition to encrypting any information stored in cookies, some websites add extra layers of security to browsers' cookie handling processes: store only anonymous but unique content on local cookies; or store personal information on the website's server and make it accessible only by matching with it the anonymous cookie stored on your computer.
See how personal data can be linked to a cookie to produce a customized website experience.
This depends on how a website has set up its cookie feature, but generally the content of a cookie is a randomly generated set of characters. For most purposes a website sending a cookie does not need to know who you are - it just needs to remember that it has seen your browser before (for more information, please go to the manage cookies section.).
Some websites do write personal information about you into a cookie, but this is only possible if you have provided them with the information in the first place. If personal information is stored in a cookie it is usually encrypted - coded - so that any third party who has access to the cookie folder of your browser cannot read it.
Some website servers use a combination of methods: on your browser they may create a cookie with unique but anonymous content; or on the server side they may create a file that logs that unique but anonymous content alongside any personal information that you have provided.
View a demonstration of how personal data linked to a cookie can provide you with personalised content on a web page.