The Spanish midfielder has been speaking to El Pais,, and he has revealed how Van Gaal wants Manchester United to play football.
Van Gaal has been under some criticism for his football this season, with his brand of play not bringing entertainment, although results have been great.
United look well set for a top-four place and a return to the Champions League, although some of the football has been far from exciting.
However, their last two games against Tottenham Hotspur and Liverpool showed the potential of the Red Devils team, with the performances much closer to what was expected from the Dutch coach following his arrival at Old Trafford.
The veteran coach also came under criticism for sticking by obviously under performing members of the first-team, and leaving out players who have proven themselves when given a chance.
Two of these players, Juan Mata and Herrera, have since become key figures, and they played vital roles in the victories over Spurs and Liverpool.
It was a surprise to see Herrera out of the first team, considering his style of play ties in so heavily with how van Gaal has his team playing, and speaking to El Pais, the Spanish midfielder has outlined the main traits of van Gaal’s management philosophy.
The Spanish playmaker said: “In the attack itself, Van Gaal believes in numerical superiority, playing in triangles, and not to run with the ball.
"He is a lover of possession and does not like to put the ball at risk. He wants long possessions and to have the ball because he believes that the spaces being created on the pitch can become an advantage as the team has the quality to score.”
The same traits that Herrera has highlighted are the ones that van Gaal was being criticised for in the early stages of the season - the desire for possession and lack of attacking movement.
However, with performance levels improving and the results to go with it, the Dutch coach’s philosophy looks to be working, and it would come as no surprise to see the club challenging for silverware next season.