Callout:

A callout is a short, shared name for a location on a Counter-Strike 2 map, such as a site, doorway, corridor, or corner. Players use callouts to communicate enemy positions, rotations, and strategy quickly and clearly during a round.

Callouts matter because they reduce confusion and help teammates coordinate in real time. They can be official map names or community-used labels, and they may vary slightly by region or map.