Meaning
A small red triangle pointing downward. It means down, decrease or lower, and it is often used to point at something below.
Shops use it for price cuts and sales, and people use it for falling numbers or to direct readers to a link underneath: “Prices 🔻 for this weekend only, grab them now” In finance posts it marks a drop, matching the red-for-down convention on Vietnamese stock boards. Its partner is 🔺.