Full explanation — Stack
A player's stack refers to the entire collection of chips they currently possess on the poker table. In cash games, stack sizes are usually measured in monetary value, reflecting the buy-in. In tournaments, however, stacks are typically expressed in terms of big blinds (BB), providing a relative measure of a player's chipping power and how many orbits they can survive. For instance, a '40BB stack' indicates a player has 40 times the current big blind in chips. Managing stack size effectively is crucial for strategic decision-making, influencing bet sizing, shove ranges, and overall tournament survival or profit potential.