The best term depends on the type of feedback system being used, though a more general term can always be used in place of a specific one:

• Likes only: like, preference, upvote, recommendation, etc.

• Likes and dislikes only (not always subtracted from each other): vote

• Multidimensional feedback (eg like, lol, sad, angry): feedback, reaction (what Facebook calls them), opinion, etc.

The best term would depend on the type of feedback system being used, though a more general term can always be used in place of a specific one:

• Likes only: like, preference, upvote, recommendation, etc.

• Likes and dislikes only (not always subtracted from each other): vote, mark

• Multidimensional feedback (eg like, lol, sad, angry): feedback, reaction (what Facebook calls them), opinion, etc.