Deduction Tactics is a turn-based strategy game. As such, it has turns. Many games have a very specific order of events that occurs each turn: a random card game might have a "Draw Phase → Standby Phase → PlaceCards Phase → Attack Phase → EndOfTurn Phase" and all events must be done in that particular order - you are never allowed to place cards after attacking in this example. There is a conceptual StartOfTurn phase and EndOfTurn phase, but a player has no control over those phases and excluding those two phases anything may be done in any order.
This is more of a programmatic detail, but as the first thing done at the start of a turn, each of the current turn's player's tokens' are enabled such that they are given a number of Move actions equal to their speed and an attack action.
The first visible effect of a turn is that a counter for how long a status will remain counts down and possibly the status wears off. Then the effects of statuses takes place. Movement, damage, reduction of move actions or attack actions. The statuses wear off first to ensure that there is at least one turn out of three where a token is not overly crippled by a status.
This is the part of a turn where a player can give commands to tokens. Each token may use its remaining move and attack actions in any order.
A Move action consists of a token moving from one space to an adjacent space. A unit is given a number of these equal to its speed.
Movements can be conceptually simplified to, instead of three one-space moves as an example, one three-space move or one two-space move and a one-space move. Just remember that, unlike Fire Emblem as an example, it is possible to move both before and after and attack.
There are two types of attack actions: Damage and Status. The first deals Damage and the second inflicts a Status. A unit may attack any unit that is a number of spaces less than or equal to its range away. Attacking will reveal certain attributes about a token to an opponent(s): Element and AttackWeapon for a Damage Attack and AttackStatus for a Status attack.
Any of a token's unused Actions are removed, squandered, exterminated.