To the casual observer, it is just a photo of a man holding up a smiley face - an image used hundreds of millions of times a day in messages across the world to say "happy". But this smiley face ...

The majority of emoji sent are positive or happy emotions Around six billion ... around 70% are emotion based – for example, smiley face, love hearts. A smaller proportion of the emoji sent ...

Here are the meanings of different happy-faced emojis ... These are similar to the two simpler smiley faces. However, they're ...