We also use the personal data for related internal administrative purposes - such as our accounting and records - and to make you aware of any changes to our services.<br> </li> <li>To send marketing communications when we have your permission, or when permitted by law.<br> </li> <li>To personalise our services (for example, so you can sign in), remembering your settings, displaying personalised advertising as well as measuring how effective our online adverts are, recognising you when you sign in on different devices and tailoring our marketing communications based on what you read on our sites (including Guardian Jobs and Guardian Holidays).