Great article from a great source, The Coaches Site!

Defending the Slot & Net Zones: 7 Tips for Young Defensemen
In Skills by Mike Coldham - October 24, 2018
This chart reveals the area where most goals are scored in the game of hockey. The dark green area (net/slot zones) is a prime scoring area. Goals scored in the dark green area result from some of the following offensive tactics:

puck deflection by a player standing in the green area
wrap around by a player coming from behind the net
walk out by a player coming from behind the goal line area
offensive player driving the net with his/her stick on the ice for pass or deflection
player beating a defensemen one on one and going to the net from below the hash marks or front of the net
player winning a loose puck battle in the green area and getting a shot on net
So, while we’re coaching our young defensemen, how can we defend against those offensive opportunities?

Tip # 1 – Strong Hockey Position

Defensemen defending