If coaches ignore the goalkeepers, they do so at their own peril. From the back of the team, the goalkeeper can see all, and from that position can help direct play. The goalkeeper should be encouraged to play a leadership role in communicating information to the team - in particular the defenders. The goalkeeper should physically move up and back with the team as the ball moves up and down the field. Of course, the goalkeeper should not move out much further than the edge of the penalty box.
Goalkeeper moves forward and backwards with play.
The coach must work with both the goalkeeper and the field players in certain key areas, where the goalkeeper's role assumes critical importance in the deployment of players. Defending at corners. Defending at free kicks. Defending at throw-ins. Moving players out of defending positions after a clearance.