Outside Passed Pawn: A passed pawn which is far away from the main set of pawns is called an ‘Outside Passed Pawn’
In this example we can see that which as an extra pawn on queen wing. Actually, the position is equal but after exchanging the queen side pawns white will get an outside passer.
White to play:
1.a4 Kd5 2.b5 axb5 (2… a5 means protected passer is created 3.b6 Kc6 4.Kxe4 Kxb6 5.Kd5 Kb7 6.Kc5 Ka6 7.Kc6 Ka7 8.Kb5 Kb7 9.Kxa5 Ka7 10.Kb5 Kb7 11.Kc5 Kc7 12.Kd5 Kb6 13.Ke5 wins for white)
we can see how the king is overloaded to manage e pawn as well as to stop b pawn.
4.Kxe4 Kxb5 5.Kf5 Kc4 6.Kg6 Kd3 7.Kxh6+-
Black to play also white wins by using same method i.e, creating an outside passer