In the early days of online chatting people used different characters on the keyboard as a shortcut to convey an emotion. The happy face :) to convey happiness or joy. The frowny face :( to convey ...

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.

Here’s how much Americans are actually tipping: survey “We hypothesized that if we gave them this smiley face, or if it was kind of cute ... with different emoji printed next to each amount ...