The game of badminton is to play on a court a shuttle. That is done in a way, that it not can be brought back correctly by a counterparty.
The game is played as a match. That brings extra excitement and effort.
To win the match, the game must be played well. Being played as a match makes the game to the means to win the match. This brings extra tactical challenges to the game.

When playing a badminton match, in the first place the court, the counterparty, and the own party are to be seen. By looking around and continually being aware of the exact location of the borders of the court, the net, the counterparty and the own party, places are being revealed where the shuttle can be placed and might come back. Constant awareness of this whole occurrency enables a controlled game, a little chess-like.

To place the shuttle then in a difficult way for the opponent or opponents, it should be estimated in which way the counterparty is least able to hit it back. That should go on in a rally untill they aren't able to bring it back at all.

To place the shuttle in such a difficult way, it is to be struck to the rear line, a sideline or just over the net. An other possibility is to reckon with the difficulty for the opponent to react quickly and well to shuttles near to his body. A third possibility is to play the shuttle as fast and hard as may be, to let the counterparty lose control over the shuttle.

To place the shuttle in a difficult way for the counterparty, one should position himself in a way, that he (she) can reach the coming shuttle as quickly as possible.
To get to a position which enables reaching the shuttle early, a position as near to the net should be taken in. With this position should be reckoned with the width of the court and that the rear court still can be reached.
Each time after hitting the shuttle, a player must estimate how the shuttle might return. That prepares him for the next shot. Then he positions himself in a way which enables him to reach most easily and quickly the next coming shuttle. And that with an appropriate stroke.
Because of this need to continually cover the whole court for the next stroke, the repeated moving across the court turns practically around about the middle of the court in a singles play.
As to positions in a doubles play, a player has to reckon with a partner and let an appropiate part of the court to him. The covering of the court turns again around about the middle of the court, but each player has to position himself out of that centre. From those decentralized positions he controls the court.

Tactically, in a badminton match the smash is the most important stroke. That is because the counterparty is to position himself in a way that a smash can be returned. That is reckoning with the width of the court. The counterparty is then less able to quickly going to the net or rear-line. This makes that counterparty slower and having difficulty in reaching these placed shuttles.
In general, high returns given by the counterparty are advantegeous for the next shot, because much more variations in placing and speed are possible then.