Engine analysis - Missed win and tactics

I stared reading some books on tactics and doing many more puzzles.

One of the books defines tactics as: Forced maneuvers leading to gain of material or checkmate.

When engine highlights a move as a missed win is this the only time when I could have missed a tactic?

aka if I had a game with a single missed win does it mean that the way the game was played till that point I actually had only one chance to try to solve the puzzle and win? and there was no other tactics possibilities till that point? 

Thank you for the answer, this is all good about the meaning of the tactics and tactics definition. But what I was actually asking about, maybe I wasn't clear, what is the average frequency of tactic with intention of gain material during a typical game?

Is it maybe one or two times , is it at every move in mid-game and so on. I just want to get a feel for it - hope it makes sense.

Going back to engine, when it flags a single move as a missed win in my game does it mean this was only time engine thinks I could apply tactic to gain material?

When you do puzzles you know that something is there but when you play a game no one is telling you there is an exchange that will win you a pice. So how paranoid should I be about trying to find it within a game?

Is it that once is enough and if you find it you should get advantage and much better chance to win the game?

hello. the frequency if tactics can vary a lot from one game to the next. They can be influenced by the type of opening and the playing style. If an opponent sees a tactical threat they may play to avoid it. Generally, the idea of tactics includes the threat of tactics, so you can use the threat to control aspects of the game, such as preventing your opponent from occupying a key square. Sometimes a threat is more effective than the execution. So you may have games were material isnt directly won due to the execution of a tactic but tactics have a strong influnence on the outcome by constraining your opponents play.

Generally, open games where the central pawns have been traded off are more tactical because there are open lines for pieces to more easily manoeuvre and attack each other. Closed games tend to be less tactical. But there are probably many exceptions.

Perfect. Thank you both!