CKAN provides several key features that allow users of a CKAN portal to communicate and collaborate on data.

Comments extension – users can add comments and discussion on a dataset. The extension can be enabled or disabled at any time.
Share – users can quickly and easily promote and discuss a dataset using twitter and facebook integration.
RSS/Atom feeds – create feeds of any changes and revisions to datasets and groups.
Follow extension – ‘follow’ a dataset to be informed of any changes, updates or new activity.
To do extension – flag a dataset with an issue or instructions of what is missing or still ‘to do’. This allows for a community driven effort for improving and adding to metadata.

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