This game was a display of Carlsen superior endgame skills. His opponent does not manage to win with 3 pawns more. And we saw the best two players on earth here! Without increment the whole video would have been only a few seconds. If Carlson had taken the pawns it would have been a draw, so it was a technical win for him as it was possible for him to win with a lot of help from his opponent. Alireza wanted to win and lost. He could run away with his king and let the pawns stay undefended then it would have been a draw if Carlson had taken the pawns, but he did not and tricked him in the end.

I have improved very well by analyzing every lost game after the game. If I play just for fun my rating is dropping like a stone :) Good luck!