You can like announcement replies in your course. To view the Like icon on announcements, you must allow users to like replies in a course announcement.
In Course Navigation, click the Announcements link.
Click the name of an announcement.
Like Announcement Reply
Locate the reply and click the Like icon.
View Liked Reply
The Like icon will change from gray to blue, indicating you have liked the reply .
When a reply is liked, the Like icon will also display the total number of likes for all users in the announcement .