They can do this because websites and other online services can read and write these files, enabling them to recognise you and remember important information that will make your use of them more convenient (e.g. by remembering your user preferences). 2. WHAT COOKIES DO WE USE? Below we list the different types of cookies we may use on the Services. Essential Cookies. These cookies are essential to the operation of our service in order to enable you to move around it and to use its features.