Currently, Twitter users click on a heart icon if they want to "like ... emojis such as a laughing crying face, a sad face with a single tear, a thinking face, hands clapping or a heart.

The thinking face “gives you a chance to say, 'Hey I’m watching.'” Numbers on emoji use in 2017 aren’t available yet, but Jeremy Burge, founder of Emojipedia, says that 🤔 has placed in ...