1. A computer-implemented method comprising: receiving, by a social networking system, location information for a device associated with a first user of the social networking system; associating the location information with the first user in a user profile associated with the first user of the social networking system; sending, from the social networking system, to a second user a communication generated based at least in part on the location information; operating at least one social network application server for interacting with users of the social networking system, wherein at least some of the users of the social networking system are users of wireless computing devices; providing a first mobile application for interacting with the social networking system via communication with the at least one social network application server, the first mobile application providing social network application operations independent of operations of a separate browser application, wherein (i) the first mobile application is further operable to employ geolocation functions of a respective wireless device to communicate geolocation information to one or more servers of hardware and software of the social network application, (ii) the first mobile application is programmed to upload photos to a respective user account with text descriptive information manually entered by the respective user for sharing via the social network application by the respective user, and (iii) at least some entries of text descriptive information communicated from the first mobile application and received by the one or more servers of the social network application are indicative of current activities of respective users; receiving app usage information, by one or more servers of hardware and software, from a plurality of second mobile applications of different types executing on respective wireless computing devices that is generated independently of user initiated web browsing operations, wherein (i) each of the plurality of second mobile applications includes code for installation on respective wireless computing devices for application operations on respective wireless computing devices, (ii) the plurality of second mobile applications include at least mobile gaming applications that include code for conducting gaming operations without employing a separate browser application on the respective wireless computing device for gaming operations, (iii) the plurality of second mobile applications include mobile digital content applications for accessing digital content from a respective library of digital content without employing a separate browser application on the respective wireless computing device for digital content presentation operations, (iv) the plurality of second mobile application include shopping-related mobile applications for completing shopping operations without employing a separate browser application on the respective wireless computing device for shopping operations, and (v) the second plurality of mobile applications are functionally integrated with the social networking system to share social network user activities and user activities of the second plurality of applications; combining app usage information from the second plurality of mobile applications with social network application information, wherein the combining comprises correlating non-social network application activities to respective identities in the social networking system and wherein the app usage information from the plurality of second mobile applications includes app-specific actions or postings that differ depending on a respective mobile application or mobile application type; generating mobile app usage analytic data, from combined app usage data, relating to aggregate mobile app usage information across at least the plurality of second mobile applications by multiple different users at multiple different locations; and providing centralized app advertising, by one or more servers of hardware and software, for the plurality of second mobile applications, wherein the providing centralized app advertising comprises: communicating one or more web pages, by one or more servers of hardware and software, for management of mobile advertising campaigns across multiple ones of the plurality of second mobile applications by respective advertisers, wherein the one or more web pages for management of mobile advertising campaigns include presentation of recent app usage analytics and time-averaged app usage analytics.