These pieces of information are used to improve services for you, for example:
- Enabling a service to recognise your device so you don't have to give the same information several times during one task.
- Recognising that you may already have given a username and password so you don't need to do it for every web page requested.
- Measuring how many people are using services, so they can be made easier to use and there's enough capacity to ensure they are fast.
What are cookies?
Cookies are small files created by websites. They are used to help websites perform better - for example by remembering certain information such as an email address that has been entered in a form. These are stored on your computer and don't harm computers in any way. They can only be reused by the website that created the cookie.