Knight endgames are like king and pawn endgames. This rule of thumb was given by former world champion Mikhail Botvinnik, who observed that if a king and pawn endgame was winning, the evaluation would be the same with knights on the board. We can infer that protected or outside passed pawns can be a huge asset in knight endgames, because the stronger side can always offer to trade knights, and the defending side will need to retreat in order to avoid the trade.
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[Event "rated untimed match"] [Site "?"] [Date "1900.??.??"] [Round "?"] [White "Marshall"] [Black "Burn"] [Result "1-0"] [Annotator "David Hayes"] [BlackElo "0"] [FEN "r3r1k1/pbpn2b1/1p3qQ1/3p2N1/3P4/2N1P3/PP3PP1/R3K2R w KQ - 0 1"] [SetUp "1"] [TimeControl "0"] [WhiteElo "0"] 1. Rh8+ Kxh8 2. Qh7# 1-0