What setting is necessary to allow users to edit case feed in Salesforce?

To allow users to edit the case feed in Salesforce, enabling Chatter feed tracking is essential. This feature must be activated for the case object, as it integrates a social collaboration tool within Salesforce, allowing users to interact with case records via the Chatter feed. When Chatter feed tracking is enabled for cases, it provides the necessary framework for user engagement and edits within the case feed, allowing for updates and modifications directly in the feed.

This setting enhances collaboration and ensures that all relevant discussions and edits are captured alongside the case history, making it easier for teams to stay informed about the case's status and contributions from multiple users.