Protected passed pawns in a King and Pawn ending are often a winning advantage. In the following blitz game played at ICC, Black just played e4 producing a protected passed pawn, but is probably still losing . Black has a “good bad bishop” as it is outside of the pawn chain. Yes Jeremy Silman actually used the phrase “good bad bishop” in his very well-known work How to Reassess your Chess. We all know what this excellent chess author meant by his apparently contradictory phrase.
Black’s Bishop is bad because of the f5, e4, and c6 pawns that impede the motion of the Black Laufer. These pawns are also targets for the good White Bishop and White’s blockading Monarch which is much more mobile that it looks. Black’s Prelate is good because it has some decent mobility in front and behind the pawns.
White is probably winning because of the possibility of mobilizing his Queenside pawns netting a passed pawn OR just waiting around and torturing Black for acquiescing to such a miserable position. There may be Zugzwang positions involving King to d4 as long as the White Bishop can prevent passed e4 pawn from queening.
Finally another feature of the position is Black is burdened by maintaining/protecting three pawn islands, namely a7, c6, and the “island” of pawns at h6,g7,f5, and e4. White, meanwhile, only has two pawn islands to tend to.