I don't understand the "victory condition" for chess puzzles

VERY new player here. Chess.com is a great site but sometimes I don't understand the instructions on all of their offerings for chess education. Can someone just tell me please if the following statement is true:

1. On a chess puzzle, to solve the puzzle the player must look at the positions on the board and decide what is the ONE best move at that moment in time.

Sorry for the elementary nature of this question. I am trying to learn chess during quarantine.

you have to chose the move that the puzzle wants you to do. NOT the best move (altho in most cases it is the best move)

For lower rated puzzles, roughly less than 1000, there is normally only 1 tactic which is either checkmate or a large material gain and the moves will be forced involving checks and captures. At higher ratings there may be multiple tactics in the puzzle, for example a hanging piece and mate. If you go for the piece and miss mate you lose the puzzle. It is a case of look for a move then look for a better one. Also with higher rated puzzles the initial move may be a threat rather than an outright capture or check. Sometimes the puzzle completes early so you might calculate a 4 move forced checkmate but it goes green on the second move so you dont quite get the satisfaction.

Wrong ... it's always the best move (except on April 1, when other conditions may be stated).

Not only that, but also in puzzles there is only one good move, all other moves are bad. In real life a winning position my have multiple winning moves, but a puzzle always has just one.