PokerTracker 3 imports text hand histories that are saved to your computer by the Cereus Network poker client. Once imported, these hands are stored within PostgreSQL and made available for review and analysis in your PT3 database.
The Cereus Poker Network is no longer in business, but the ability to manually import and display legacy hands from the Cereus Poker Network remains in PokerTracker 3.
For general information on the initial setup of PokerTracker 3, please consult the PokerTracker 3 Quick Start Guide.