Meaning
The number zero on a square keycap, part of the set of digit buttons from 0️⃣ to 9️⃣. It means zero, nothing or none.
It shows up in scores, counts and price tags, often for dramatic effect: “Sleep last night: 0️⃣ hours” It is also combined with other keycaps to write longer numbers, like jersey numbers or codes. Do not confuse it with ⭕ or 🅾️, which are a circle and the letter O.