By using the respond feature, you can make a quick response to the message content or any comments.
Users can show their intention by clicking a link such as "Like" and "Acknowledged" without posting any comment.
This respond feature may not be available depending on the settings by the system administrator.
The respond feature is available in the following applications:

Under the body text or comment where you want to respond, click "Like".
Depending on how your system administrator configured the label, you might see a different label than "Like".
To cancel your response, click "Not Like".

You can check the "Like" responses to your comments on the header.