What is a cookie?
What kind of cookies exist?
There are many other types of cookies in addition to the "authentication" cookies referenced above. For example, some cookies let the website remember your preferences, and other advertising cookies can be used to track the performance of online marketing campaigns. When browsing fxcm.co.uk there are "first party" cookies set by FXCM, as well as "third party" cookies such as a Facebook "Like" button that remembers that you liked a page.
Is there a way to prevent cookies from being set?
Cookies are generally harmless. However some users do not want their information to be stored, even if it is being used to enhance their user experience. While it is possible to block or delete some cookies, you can expect to lose some website functionality if you do so. Manage Cookies.