Pool play refers to assinging teams to a certain pool. All teams in that pool play a full round-robin against the other teams in the pool. Matchups will play on all available courts in the tournament.
Team Generation must be set to Set Teams or Singles to work properly.
When you create teams in the system you will also add them to a certain pool.
As mentioned above all pools will play across all of your courts. Players can check their app or you can display pool play on a TV.