Facebook is so dynamic in a sense that its engineers are bringing up new features from time to time. A few days back a new feature on facebook chat was introduced. The new feature is none other than the Seen HH:MM feature. A lot of people (facebookers) are finding it strange and they don’t know what it means. In this web apps usage tutorial I am going to tell you what Seen HH:MM means.
Seen HH:MM is the generic syntax of this new feature on facebook chat. Now lets break it down to know what HH:MM mean. HH represents hours and MM represents minutes.
Examples
- Seen 19:24
- Seen 07:00
- Seen 20:28
Explanation
From the above examples we have Seen 19:24, Seen 07:00 and Seen 20:28. This means that the message you sent to someone on facebook chat was viewed / opened / read at 19:24 or 07:00 or 20:28. Please note that the above were just selected example but it can be any other time depending on how it is specified by the Seen HH:MM
The following is a screenshot of the facebook chat box where the Seen HH:MM is used. Due to privacy issues I have decided to give some parts of the screenshot the blur effect and I have also replaced profile pictures with colored squares labeled A and B to identify the parties involved in the chat.

The part highlighted with an orange boarder is the Seen HH:MM feature. Basing on the screenshot above, the chat message that was sent to B from A was viewed / opened / read by B at 12:51 hence the Seen 12:51 alert.
Conclusion
The Seen HH:MM feature on facebook is simply an alert to the message sender that your message has been viewed / opened / read by the receiver.
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