What is a cookie?
A cookie is a file created by a web browser, at the request of a web site, that is stored on a computer. These files typically store user-specific information such as selections in a form, shopping cart contents, or authentication data. Browsers will normally clear cookies that reach a certain age, but clearing them manually may solve problems with web sites or your browser.
Data is collated by Google analytics which records page or website views. It collects a basic location, normally town and country but not street. It also records the type of browser used.