Endgame technique is where the term comes up most often, so I'll start there.
Think about the basic king+rook vs king checkmate. You force the opponent's king towards the edge of the board by using your king and rook in concert. If you know how to do it, you can do it flawlessly, in the fewest number of moves. If you don't, you tend to blunder around wildly for awhile until you either figure it out, get lucky, queen another pawn, or run out of moves (50 move rule). Even if you win, you could have sloppy technique--that is, you got there, but in a haphazard way, not a precise, calculated way. The bishop+knight checkmate for example, requires good technique. Endgame technique refers to your knowledge of how to play specific endgames, as well as your ability to play them correctly.
When someone says "and now it's a matter of technique" what they're saying is "the game is theoretically won, all that we have to see now is whether or not the player can properly execute his winning strategy".
Someone with good technique who has gained an advantage will secure his advantage, deny his opponent counterplay, improve his position, and only then go for the kill. Someone with bad technique (or no technique, if you prefer), who has gained an advantage will immediately seek to go on the attack and win on the spot, whether the win is there or not. Often this leads to a failed attack, and gives the opponent opportunities to gain his own compensating advantages. For example, one player may go all out on a kingside attack, completely neglecting his queenside and center. When the attack fails, his pieces are completely out of position to defend his queenside, and his opponent can execute his own attack.
It's about playing the right moves, for the right reasons, in the right order. Being methodical.
I've been wondering about this and I can't explain it myself so that's why I'm posting this question to you people.... What exactly is good chess technique?
I recently read somewhere that Capablanca has exceptional technique. Also, years ago, I would play a Cubano co-worker (Eddie) during our lunch breaks where he would utterly destroy me 97% of the time.... if and when I did win it was because he wasn't paying attention. Regardless, he never failed to say as he swiftly maneuvered his pieces, "You like to play, that's good! But you have no technique!"
So does anyone care to expound on what is good chess technique? Thx in advance-