Abstract: In one embodiment, a method includes, sending, to a client device of a user of an online social network for presentation to the user, one or more references corresponding to one or more content items of the online social network, respectively. Each reference is presented with one or more call-to-action elements. Each call-to-action element is a user-interface element that prompts an action from the user to initiate a particular function or process related to the content item via the online social network. The call-to-action elements for each content item are presented in ranked order based on a suitability of the call-to-action element to the content item. The method includes receiving a selection of a call-to-action element presented with a reference corresponding to a particular content item. The method includes executing the function or process related to the content item on the online social network prompted by the selected call-to-action element.

Abstract: In one embodiment, a method includes receiving a request to display a media plug-in on a third-party website hosted by a third-party system, determining media content associated with the request to display the media plug-in, and determining whether the third-party website is being viewed by a user that is currently logged in to the social-networking system. The method further includes determining one or more user-selectable objects based at least on the determined media content and the determination of whether the user is currently logged in to the social-networking system and providing the determined one or more user-selectable objects for display in the media plug-in on the third-party website. The third-party system is separate from the social-networking system. The user-selectable objects, once selected, cause an action related to the determined media content.

Abstract: In one embodiment, a method includes determining available media content from one or more content sources, providing at least a portion of the available media content for display on a display device of a user, and determining whether a media action button should be displayed on the display device. The media action button is provided for display on the display device when it is determined that the media action button should be displayed. The media action button is operable to perform an action associated with particular available media content.

Abstract: A social networking system provides relevant third-party content objects to users by matching user location, interests, and other social information with the content, location, and timing associated with the content objects. Content objects are provided based on relevance scores specific to a user. Relevance scores may be calculated based on the user's previous interactions with content object notifications, or based on interests that are common between the user and his or her connections in the social network. Context search is also provided for a user, wherein a list of search of results is ranked according to the relevance score of content object associated with the search results. Notifications may also be priced and distributed to users based on their relevance. In this way, the system can provide notifications that are relevant to user's interests and current circumstances, increasing the likelihood that they will find content objects of interest.

Abstract: In one embodiment, a method includes sending a request from a first user for communication-channel information associated with a second user to a computing device, and receiving one or more user-selectable elements corresponding to each communication channel of a plurality of communication channels from the computing device, wherein the plurality of communication channels are determined based on an affiliation coefficient between the first user and the second user, wherein each communication channel is associated with a score calculated based on a social proximity between the first user and the second user, and wherein the one or more user-selectable elements corresponding to each communication channel of the plurality of communication channels are presented in an order ranked based on the respective score associated with the communication channel.

Abstract: Advertisement content associated with an entity having a physical location is selected for display to a user by a client device. A proximity of the client device to the physical location is determined. In response to determining the proximity between the client device and the physical location, an advertisement is generated that includes the advertisement content and an indicator of the physical location. The generated advertisement is sent to the client device for display to the user.

Abstract: An online system or an application of the online system generates and provides user interfaces that include user interface elements configured to allow users to browse newsfeed stories. For example, users can browse newsfeed stories via scrolling actions. The user interface elements are further configured to control presentation of individual stories that include series of images. The user's scrolling action causes the images to be presented sequentially. The online system selects a particular image and configures a speed of presenting the images according to the user action. The online system further generates and provides user interfaces that present still images in a parallax effect by adjusting viewpoints of observing the still images. The viewpoints can be adjusted according to the user action. The online system further configures the user interfaces to present related stories in adjacent positions and to present 360-degree videos as well as panorama images.

Abstract: In one embodiment, receiving a first action from a user of a computing device, wherein the first action causes the computing device to power up while a screen of the computing device is locked; obtaining a plurality of dynamic information items relevant to the user of the computing device; and displaying at least one of the plurality of dynamic information items on the locked screen of the computing device.

Abstract: An online system provides a local reach advertisement create flow that determines an estimated radius of a target area for serving an ad to optimize local awareness of the ad based on the advertiser's ad campaign goals. The ad create flow receives location information about an ad target location identified by or associated with the advertiser, and information describing the ad campaign associated with the advertiser. Using the advertising information and population density information associated with the ad target location, the online system selects a target area for serving the ad to reach an estimated number of online system users based on the ad budget and provides an indication of the selected region and the estimated ad reach to the advertiser.

Abstract: In one embodiment, a method includes determining available media content from one or more content sources and providing at least a portion of the available media content for display in a programming guide on a display device of a user. The programming guide includes a plurality of entries each associated with one of the available media content. The method further includes determining that an update action button should be displayed on the display device, providing the update action button for display on the display device when it is determined that the update action button should be displayed, and updating the programming guide in response to a user selection of the update action button. The update action button is operable to cause the social-networking system to update the programming guide.

Abstract: In particular embodiments, one or more computer systems of a social-networking system receive a first video stream from a content source, receive social content from a social graph of the social-networking system, and generate an overlay area comprising at least a portion of the social content. The social graph includes a plurality of nodes and edges connecting the nodes, the nodes comprising user nodes that are each associated with a particular user of the social-networking system. The one or more computer systems of the social-networking system determine a placement for the overlay area within the first video stream, generate a modified video stream using at least the first video stream and the overlay area, and provide the modified video stream for display on a display device. The overlay area is placed within the modified video stream according to the determined placement.

Abstract: In particular embodiments, one or more computer systems of a social-networking system determine a first media device of a first user of a social-networking system and determine a second media device of a second user of the social-networking system. The one or more computer systems access a social graph of the social-networking system, update the social graph based on the determined first and second media devices, and stream media from the first media device to the second media device using the updated social graph. The social graph includes nodes and edges connecting the nodes, the nodes including user nodes that are each associated with a particular user of the social-networking system and concept nodes that are each associated with a particular media device.

Abstract: In particular embodiments, a social networking system queries a social graph of the social-networking system for social content associated with video content provided to one or more users of the social-networking system and accesses privacy settings associated with each of the one or more users. The privacy settings indicate whether a particular user has authorized the social-networking system to share social content associated with the particular user with one or more third parties. The social networking system provides the social content associated with video content provided to the one or more users to a particular third party if the privacy settings of the one or more users indicate that the one or more users have authorized the social-networking system to share the social content with one or more third parties.

Abstract: A first computing system provides an API to a third-party computing system. The first computing system receives via the API, from the third-party computing system, a registration API call including a registration request to associate an information item with a call-to-action defined by the third-party computing system. The registration request specifies the information item, the call-to-action, an underlying action, and a URL associated with the call-to-action. In response, the first computing system registers the call-to-action. After registering the call-to-action, the first computing system receives a request from a client device associated with a user of the social network. The request indicates that the user interacted with the information item at the client device. In response, the first computing system determines whether the information item is associated with the call-to-action. When it is associated, the first computing system sends the call-to-action to the client device for display.

Abstract: In one embodiment, a user of a social networking system requests to look up a contact's communication channel information in the user's address book. The social networking system provides to the user the contact's communication channels in an ordered sequence based on the user's social graph and communication information.

Abstract: In one embodiment, a method includes determining by a computing device a set of videos that a user may watch. For each video, a coefficient value is determined for each of one or more coefficient factors. At least one of the coefficient factors has a value that would be coincident with the user watching the video. A video coefficient for each video is calculated based on the coefficient values of its coefficient factors, and the videos are ranked based on their video coefficients. The rankings are then provided for presentation to the user.

Abstract: In one embodiment, a method includes, by one or more computing devices of an online social network, receiving, from a client system at a first location, an audio input from an unknown user, identifying a first user of the online social network who is proximate to the first location, identifying the unknown user as a second user of the online social network based on a comparison of the audio input to one or more voice recordings of one or more candidate users stored by the online social network, respectively, wherein each voice recording comprises audio data for auditory identification of a unique user of the online social network, and wherein each candidate user is within a threshold degree of separation of the first user within the online social network; and sending customized content to one or more of the first user or the second user based on their social-networking information.

Abstract: A social networking system provides relevant third-party content objects to users by matching user location, interests, and other social information with the content, location, and timing associated with the content objects. Content objects are provided based on relevance scores specific to a user. Relevance scores may be calculated based on the user's previous interactions with content object notifications, or based on interests that are common between the user and his or her connections in the social network. Context search is also provided for a user, wherein a list of search of results is ranked according to the relevance score of content object associated with the search results. Notifications may also be priced and distributed to users based on their relevance. In this way, the system can provide notifications that are relevant to user's interests and current circumstances, increasing the likelihood that they will find content objects of interest.

Abstract: In particular embodiments, a computing device may receive authentication information provided by a temporary user and retrieve personal information associated with the temporary user from a server using the authentication information. The device may present a personalized user interface on a screen of the computing device for the temporary user, the personalized user interface being generated based on the personal information. The device may detect a terminating event that indicates access to the computing device by the temporary user is to be disabled. The terminating event may be detected by determining that a biometric information associated with the temporary user is undetectable, or determining that the computing device is put down. In response to the detected terminating event, information associated with the temporary user may be removed from the computing device, and the computing device may be reverted to a default state.

Abstract: In one embodiment, a computing device selects a number of location updates from users which corresponds to a place. Each location update includes data indicating a geographic location that a user was at, and a time corresponding to when the user was at the geographic location. The computing device selects a first subset of the location updates which have geographic locations within a particular geographic area. For each location update in the first subset, the computing device determines a corresponding user and time. The computing device selects a second subset of location updates, each location update in the second subset corresponding to a user from the first subset, and a time within a threshold time of the time of the location update in the first subset. The computing device generates a probability map based on a distribution of geographic locations corresponding to the location updates in the second subset.