It basically means, in a room in your house where you have speakers, take the left and right speakers and put them on the ground in the corners and have them face each other.
THEN stand about 2-5 feet behind them and about a foot away from the front to back axis the left speaker makes.
Then finally listen to music with the speakers like that.
Thats how most cars sound.
Then put the speakers at ear level and have them 30* from the centreline and equidistance from each other and you in a triangle.
Thats what audio is SUPPOSED to sound like.