There are (at least) three good uses for [ThePieceTracker]: opening preparation, middlegame themes, and player preparation.
Use [ThePieceTracker] with [TheTreeWindow] opened. By tracking pieces you can see trends in the current opening such as common pawn pushes, knight outposts, and where the bishops are most often placed. You may find it useful to set the move number range to start after the current move in the game, so the moves made to reach the current position are not included in the statistics.
[ThePieceTracker] can be useful when the filter has been set to contain a certain ECO range (using a Header search) or perhaps a pattern such as a White IQP (using a Material/pattern search). Set the move range to something suitable (such as 20-40), and track pieces to see pawn pushes in the late middlegame or early endgame, for example.
use a Header search or the Player information window to find all games by a certain player with one color. The Piece Tracker can then be used to discover how likely the player is to fianchetto bishops, castle queenside, or set up a d5 or e5 pawn wedge, for example.