Disallowing the movement/infiltration of ur oppent. This can also be used in the middle game.
Endgame Camp #Endgame

Here is a game I played just look at the kinght on d7 (move no. 15)
https://www.chess.com/analysis/game/live/111644527821?tab=analysis&move=29
You can share endgame tips, strategies and tactics here.
This is official Endgame Understanding Camp