Used outdoors it can allow squads to move large distances with relatively impunity whereas without this cover they would be extremely exposed

Indoor use is not generally recommended as defenders will generally know where an attacker is coming from whereas the opposite does not hold true. Thus, you will only succeed in blinding yourself. However, if you know the layout of your target well and need to travel through several rooms to reach your destination then the auspicious use of smoke grenades can be of great help.