We may associate activity and accounts under a single user ID.&nbsp;</p> </li> <li> <p>Carry out or support promotions.</p> </li> <li> <p>Conduct research and support innovation.&nbsp;</p> </li> <li> <p>Create analytics and reports for external parties, including partners, publishers, advertisers, apps, third-parties&nbsp;and the public regarding the use of and trends within our Services and ads, including showing trends to partners regarding general preferences, the effectiveness of ads and information on user experiences.