Are you wondering what the tiny blue dot means in your Snapchat messages? Or why it sometimes turns into a smiley face emoji for seemingly no reason? Don't worry. We've got you covered.

The cold face emoji is one of many you can use to express your feelings. The blue face emoji shows a grimacing smile. The colour blue is usually associated with cold - as opposed to red for hot.

The highly-requested 'pink heart' emoji is one of three new hearts included in the release, along with light blue and grey variations. 'Shaking face', meanwhile, could be used for shock ...