Emojis are smileys and ideograms used in apps, mostly in chats and instant messengers. Smileys themselves are a very old idea. Windows 10 build 18947 showcased a number of improvements related to emoji.
Modern smileys, a.k.a. "Emojis", are usually implemented in Unicode fonts and sometimes as images. They are supported by tons of apps on mobile platforms natively although in Windows Desktop apps, color emoji support is rare unless the app supports DirectWrite. Android, iOS and Windows starting with Windows 8 can render emojis via Unicode fonts.
Starting with Windows 10 build 16215, Microsoft has simplified the process of entering and finding emoji using a physical keyboard connected to your computer.
The procedure is covered in the article
Windows 10 build 18947 comes with a refined look of the emoji panel that features a bigger emojies.
Also, the touch keyboard now allows to quickly insert emojies, just like Android's GBoard.
This could be most welcome feature by touch screen users of Windows 10. It is unknown yet when it will be rolled out to the stable branch of Windows 10. Windows 10 build 18947 represents Windows 10 '20H1', which is expected to be released in Spring 2020.
Thanks to @gus33000
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