Likes are used to express a positive opinion on content. Using likes, all community members have the ability to express positive sentiment. When members like a piece of content, status message or comment, they can promote its rank in the community and increase its influence.
Content can only be liked once by each member. Liking by anonymous users is not supported.
Liking differs from rating in that:
To review content that was liked by a member, navigate to their profile > Likes.