I like

“I like” plugin will help you to add like and dislike functionality to your post, so you can easily monitor which posts are much liked or disliked by visitors.

when people will visit your blog and find that useful they can react to your post without wasting time writing a traditional comment. also, you can monitor your post with total likes and dislikes.
you can customize like and dislike labels as your needs also can use only the icon button.