We also use website analytics tools on our Service to retrieve information from your browser or mobile device, including the site you came from, the search engine(s) and the keywords you used to find our site, the pages you view within the Service, your browser add-ons, and your browser’s width and height and other information that assists us in improving the Service. We also deliver advertisements and provide website analytics tools on non-Perfect World sites and services, and we collect information about page views on these third party sites as well.