Meaning
Two upward triangles stacked one above the other, a double-speed version of the up button. It means moving up fast or going all the way to the top.
It shows a sharp rise, like prices, follower counts or motivation, and in to-do lists it can flag top priority: “Rent went ⏫ again this year” It also works as “scroll all the way up”. Its partner for a steep drop is ⏬.