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 different ...

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.

When you're done, tap outside of the emoji window. The options will include Small Grid, Medium Grid, Large Grid, Rings, and Spiral. This will determine how your chosen emoji populates your background.