Best uses for stealth units in StarCraft II

[Blitz]

Stealth units are in StarCraft II are like the superheroes that can actually hide and sneak up on the enemies. For Terran players, the Ghosts are like the spies and they can actually sneak into the enemy's base and find out their secrets. So, the Wraiths are like ghosts that can fly and can attack the enemy from behind.