This is a gameplay video I did for PUBG Mobile where I primarily use the VSS rifle. This is not a "complete" guide or anything. It just shows off a few key components of the VSS rifle and why you may want to consider it for your future battles.
For one, it is 9mm which means you can carry a TON of ammunition with this rifle. Next, it comes with a great scope already preinstalled. Finally, it is freaking quiet.
If you have played any of these battle royal games then you know how much sound plays in your success or failure. Having a rifle on your back that is quiet, has a scope, and tons of ammunition should make it a priority.
As you can see in the video above, while using the VSS, the enemies being hit have no clue where I am. The only problem with the VSS is, later in the game most players have plenty of body armor so it becomes less and less valuable.
I prefer the VSS for the factors mentioned above, even late in the game I will keep this rifle around if possible. Early on though, having a loud rifle can possibly scare off potential enemies. No one wants to contend with an enemy that has a powerful rifle. Especially when you do not have any body armor or anything yourself.
With the VSS you can pick off enemies from a distance easily and quietly.