In Geometry Dash, the Target ID is the Group ID of the object or objects the trigger should affect.

For the player-related setup, there usually isn’t a special “player target ID” built into the game; instead, the trigger targets a group number you assign to the object you want to control, and then the trigger uses that group as its Target ID.

Quick breakdown

  • Target ID = the group you want the trigger to act on.
  • For Follow Trigger setups, the target group is the object being followed, while the follow group is the thing doing the following.
  • If you meant a different “GD” game, the term can change, but in Geometry Dash it refers to group targeting in triggers.

Example

If you want a trigger to move a platform, you give that platform a Group ID like 5, then set the trigger’s Target ID to 5.

TL;DR: the “player target ID” in GD usually means the Group ID you want the trigger to affect , not a separate player-only ID.