This ending shows the weakness of doubled pawns. White is two pawns up, but they are doubled on the d-file - and that is not enough to win: White to move, and the position is drawn (per the tablebases).
White has the king on c5, the rook on g7 and doubled pawns on d4 and d5; Black has the king on d8 and the rook on h6. Doubled pawns cannot support each other as they advance the way connected ones do, so Black has time to organise a defence and a blockade.
The lesson: it is not only the number of pawns that counts but their quality. Two connected passers are often stronger than a rook, while two doubled ones frequently fail to win even with the extra material.
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