Each character or creature has a default maximum movement distance of 10 meters (or 10 squares) that it can move during its turn. This distance can be altered by certain skills or special effects.
The move action can be used to move, but it can also be used for other actions that consume the move action, such as climbing a wall or performing a stunt.
Some of these particular movements may require an ability test (FOR, DEX or CON) whose difficulty is determined by the GM.