It is often a good idea in endgames to advance your pawns. How else are you going to turn one of them into a queen?
A menacing pawn storm in the middle game can worry your opponent. and a menacing pawn storm in the endgame can also worry your opponent.
If your pawns are advanced enough, sometimes you can crash them through with the aid of blasting the opponents pawns out of the way.
Here is an example. How does Black queen one of his pawns?
The solution to last Monday’s problem was that Nh5 was a blunder because White replies Nxd5. The Knight is safe because if it is taken by the pawn, White has Bc7 trapping the Black Queen.