Combat in Final Fantasy Tactics is turn-based and takes place on a 3D isometric grid. Each unit has a Speed stat that determines their turn order. When it's a unit's turn, they can move and then perform an action (attack, use ability, item). Terrain elevation plays a significant role; higher ground often grants an attack bonus and makes units harder to hit with certain abilities.
Understanding the 'CT' (Charge Time) system for abilities is crucial. Some powerful spells and skills require a charge time before they activate, making positioning and anticipating enemy movements vital. Status effects like Poison, Sleep, and Silence can turn the tide of battle, so learn how to inflict and cure them. Always check enemy unit information to identify weaknesses and resistances.