the.com/leaderboard

A ranking that turns your free time into unpaid competitive labor.

means A list ranking players or participants by score, usually from highest to lowest, so everyone can see who's winning.

from A straightforward compound of 'leader' (one who is ahead) plus 'board' — in the older sense of a board or placard used to post public information, like a scoreboard or notice board. The word tracks the rise of competitive sports and games needing a visible way to show standings; it became especially common with golf tournaments and, later, video games and apps, where digital boards replaced the physical chalkboards and pegged scoreboards of the past.

origin
Arcade high score lists predate video games themselves
psychology
Exploits competitiveness more than the actual reward does
design trick
Showing nearby ranks motivates more than showing number one
dark side
Call centers use them, and burnout follows closely
the.com · every word