The Facebook from today it has enriched the "Like" button and offers a range of emotions expressed with Emoji.
This Facebook move had been announced and so it was not a thunderbolt in the sky. So now, when you do like, you are given the opportunity to express various reactions like "I like", "Awesome", "Haha", "Wow", "I'm sorry" and "Mercy".
All you have to do is hold the cursor on the "button" for more than 1 second and a small window will pop up with the options listed above.