How can a Chatter user send a private message to another user without others seeing it?

A Chatter user can send a private message to another user without others seeing it by utilizing the feature of posting a private message directly to the recipient. This method ensures that the content of the message is only visible to the sender and the specific recipient, maintaining confidentiality and privacy.

Private messaging functions typically are designed to create a direct line of communication between two users, separating it from the public feed where all other posts would be visible to the group or community. This is particularly useful in professional environments where sensitive information may need to be shared securely.

The other options provided, such as using @mentions or public postings, do not ensure privacy, as they typically allow for visibility by other members in the group or feed. Utilizing a dedicated private messaging system ensures that the conversation remains exclusively between the two users involved.