As we all Know that emotions is a part of our life.Without emotions life is incomplete same is the case while chatting so in my opinion we should add emoji in keyboard.Emoji is a set of  emotions that we can use while chatting directly without making signs of them


STEPS FOR ADDING A EMOJI KEYBOARD 
1.GO TO SETTINGS>GENERAL

2.IN GENERAL SECTION SCROLL DOWN AND OPEN INTERNATIONAL.
3.THEN IN INTERNATIONAL JUST OPEN KEYBOARDS AND ADD NEW KEYBOARDS

4.TAP THE NAME EMOJI