A standard access log will be created whenever a page is viewed. This will contain information provided by your web browser such as IP addresses and referring web pages. When statistically analysed, this data is useful to ensure the smooth running of the site.
A cookie is a data file that is stored on your computer by your web browser. It usually contains basic information such as your preferences, login details if required, or just about anything else. You can decide how cookies are managed on your computer. Please refer to your browsers help files for further information.
Advertisers may also create and read cookies/web beacons for the purpose of collecting information that is important to them. Advertisers sometimes use the DoubleClick DART cookie, which helps them to show you relevant and interesting ads based on what pages you have viewed on this and other web sites. If you don't want this then it is possible to opt out of the DART cookie. click here for more details.