Of the six billion emoji that are sent globally every day, around 70% are emotion based – for example, smiley face, love hearts. A smaller proportion of the emoji sent are sad expressions.

Over time, emoji meanings have become subjective depending on a message's context and wider cultural trends. Which shaking smiley face should you use? Is there a difference between each ...

It's on mobile phones, on mugs and T-shirts. But who came up with the Smiley? According to the digital keyboard firm Swiftkey, the most used emoji of 2016 in the UK was the one of a face crying ...

1. Open Messages. 2. Tap into the right chat. 3. Long-press on a message.