Abstract: A digital magazine server receives user interactions with content items presented to users via various digital magazines. The digital magazine server retrieves interactions associated with a content item that are also associated with multiple digital magazines. From the retrieved interactions, the digital magazine server generates information describing global interactions with a content item that are associated with multiple digital magazines. The digital magazine server may filter interactions with the content item that are associated with different digital magazines based on characteristics of the interactions and the information describing global interactions with the content item generated based on the filtered interactions.

Abstract: A digital magazine server receives user comments on content items of a digital magazine and generates comment threads. A comment thread has one or more user comments associated with a content item and at least one topic. A topic thread on a selected topic includes one or more comment threads related to the selected topic. To select comment threads for a topic thread based on the selected topic, the digital magazine server determines the relevance of the topic of each comment thread to the topic of the topic thread and determines the quality of the comment thread based on a plurality of quality factors such as number of comments and timestamps of the comments in a comment thread. The digital magazine server aggregates the comment threads based on at least one of topic relevance determination and thread quality determination and selects comment threads based on the aggregation.

Abstract: A digital magazine server receives user interactions with content items presented to users via various digital magazines. The digital magazine server retrieves interactions associated with a content item that are also associated with multiple digital magazines. From the retrieved interactions, the digital magazine server generates information describing global interactions with a content item that are associated with multiple digital magazines. The digital magazine server may filter interactions with the content item that are associated with different digital magazines based on characteristics of the interactions and the information describing global interactions with the content item generated based on the filtered interactions.

Abstract: A digital magazine server receives user comments on content items of a digital magazine and generates comment threads. A comment thread has one or more user comments associated with a content item and at least one topic. A topic thread on a selected topic includes one or more comment threads related to the selected topic. To select comment threads for a topic thread based on the selected topic, the digital magazine server determines the relevance of the topic of each comment thread to the topic of the topic thread and determines the quality of the comment thread based on a plurality of quality factors such as number of comments and timestamps of the comments in a comment thread. The digital magazine server aggregates the comment threads based on at least one of topic relevance determination and thread quality determination and selects comment threads based on the aggregation.