Meaning
The digits 1234 inside a square, the label for switching a keyboard to number input. It stands for numbers, digits and anything numeric.
It fits maths homework, budgets, statistics talk, PIN reminders and puzzles: “Accounting exam tomorrow 🔢 send help” It is also a cheeky way to say a message is all about the numbers, like prices or scores. Do not confuse it with keycaps such as 1️⃣, which show single digits.