Use precise geolocation data. Identify devices based on information actively requested. Store and/or access information on a device. Understand audiences through statistics or combinations of data from different sources. Measure advertising performance. Create profiles for personalised advertising. Create profiles to personalise content. Develop and improve services. Use limited data to select content. Use limited data to select advertising. Measure content performance. Use profiles to select personalised advertising. Use profiles to select personalised content.