Management of messages and/or notifications associated with a communication platform is described herein. A communication platform, which, in some examples can be a group-based communication platform, a channel-based communication platform, a permission-based communication platform, channel-based messaging platform, and/or any other platform for facilitating communication between and among users, can enable users to exchange messages via the communication platform. In some examples, applications and/or services associated with the communication platform can provide notifications, which can present as messages, for communicating via the communication platform. In some examples, messages associated with the communication platform can be associated with metadata. Techniques described herein can utilize such metadata to improve user interfaces associated with the communication platform described herein. In some examples, such metadata can indicate priorities (e.g., low, normal, high) of the messages. In some examples, such priorities can be used to determine presentation characteristics associated with the messages. For example, high priority messages (e.g., messages that require or expect action, messages associated with particular users and/or applications, etc.) can be emphasized and/or low priority messages (e.g., messages that don't require or expect action, messages associated with particular users and/or applications, etc.) can be deemphasized to enable data presented via a user interface of the communication platform to be easier to consume. In some examples, normal and/or low priority messages can be aggregated into message digests, that aggregate messages associated with a particular application, one or more users, or a combination of application and users. Message digests can reduce clutter and improve data presentation on the user interface. As such, by utilizing metadata associated with messages, techniques described herein can offer improvements to user interfaces presented via the communication platform. This can improve user experience and user interaction between users of the communication platform and their user computing devices.