Emoji is a Japanese word. It's mean unicode. The first emoji was invented in 1990 by Japanese designer Shigetaka Kurita. In that time some of emoji we discoverd but now we have see lots of emoji.
First time when we discover emoji in messenger we saw this type of emoji. And noe it is change and and we hsve many Emojis.
Emojis are very important for our everyday texting life. In WhatsApp, Facebook, Twitter and many other social media we use it. We use it to express our feelings. Without saying anything use emoji we can express our feelings. So we should know it's proper meaning and use it properly.