Abstract: A disclosed server system for dynamically generating and serving content for presentation across different channels can perform the following operations: receive a request from a client device for a subset of content elements, the request designating a desired channel for presenting content in a page, identify the subset having at least one content attribute that satisfies one or more subset creation criteria indicating a category identifier for a slot in a page template used for generating the page, dynamically generate the subset by: for each content element in the subset, dynamically adjusting presentation of the singular instance of the content element based on presentation requirements of the desired channel, the singular instance being commonly used across all device interface types, and serve the subset of the content elements to the client device, which includes the singular instances of the content elements dynamically adjusted for presentation in the desired channel.

Abstract: A disclosed server system for dynamically generating and serving content for presentation across different channels can perform the following operations: receive a request from a client device for a subset of content elements, the request designating a desired channel for presenting content in a page, identify the subset having at least one content attribute that satisfies one or more subset creation criteria indicating a category identifier for a slot in a page template used for generating the page, dynamically generate the subset by: for each content element in the subset, dynamically adjusting presentation of the singular instance of the content element based on presentation requirements of the desired channel, the singular instance being commonly used across all device interface types, and serve the subset of the content elements to the client device, which includes the singular instances of the content elements dynamically adjusted for presentation in the desired channel.