The digit 7 on a keycap. It stands for seven, the seventh item, or a lucky number in many Western cultures.
People use 7️⃣ for lucky sevens, slot machine wins (7️⃣7️⃣7️⃣), weekly '7 days' posts and numbered lists.
Right after 6️⃣, it is a nod to the 'six seven' meme that spread among younger kids and teens.
Facts
Keycap: 7 7️⃣ 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 :seven: or :keycap_7:. People also look for it with words like “7”, “keycap”, or “seven”.
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.