This effect causes on a successful shot, that the enemy Mech lose speed for the rest of the combat duration.
Example:
If your mech/weapon used has Slow (10), every attack of the enemy Mech will lose 10 Speed points, to a posible minimun of 1 (A mech can't get its Speed reduced below 1)
Tips:
If your mech include this skill, is a good idea to focus, acquiring more equipment pieces raising the chance to slow the enemy.
Agility and speed is a good tactic when you have to deal with stronger mechs.
Notes:
Each weapon has a different speed rate, frequently being the fastest the laser weapons and the slower, the missiles and ice weapons.
To the speed of the weapon used, it is added the speed modifier of the own mech, giving the final speed accounted at every strike or combat round.