This values is used in Liquidation Price calculations
Maintenance Margin Coefficient depends on the asset and leverage traded. The higher the leverage the higher the MM coefficient. This is necessary in order to mitigate the risk of slippage when liquidating a position during a violent price move.
Check the Asset page for the specific values.
This value affects only in the liquidation price. Make sure to check the estimated liquidation price in the order confirmation popup before signing the order.