The digit 6 on a keycap. It stands for six, the sixth step, or option six.
In lists and polls 6️⃣ works like any keycap. Cricket fans use it for a six, the shot that clears the boundary.
Among kids and teens, 6️⃣7️⃣ together refers to the 'six seven' meme, a catchphrase with no fixed meaning that is often said with a hand gesture.
Facts
Keycap: 6 6️⃣ is an emoji in the symbols category, under keycap. It is one of the early emoji from Japanese phones, standardized in Unicode 6.0 (2010). On GitHub, Slack and other apps you can type it as :six: or :keycap_6:. People also look for it with words like “6”, “keycap”, or “six”.
Timeline
2010Added to the emoji standard (Unicode 6.0)
Design history
Google (Noto)
2015
2017
2021
Google Noto Emoji images: Apache 2.0. Twemoji graphics by X Corp and contributors: CC-BY 4.0.