Silver 1 - No keyboard, no mouse, game sense of a chimp. You have to in reality TRY to be this bad.
Silver 2 - If flashed: panic and throw all your nades! Buy the most expensive gun you can and never eco. Reaction time of a walrus.
Silver 3 - Run n' Gun rank. P90 and Auto snipers. Never stop moving. Throw your flashbangs when all enemies have died. What's head armor?
Silver 4 - Players here begin to notice a small circle which seems to rotate as they rotate on their screen. Disregarded until Silver Elite. M4A4 begins to be used here. Running and gunning is still very common.