What does the mantle network use for gas?

Could you please explain, in layman's terms, what purpose does the mantle network employ the concept of "gas" for? Is it similar to how other blockchain networks utilize transaction fees, or does it serve a distinct function within the mantle ecosystem? I'm particularly interested in understanding how this mechanism contributes to the overall efficiency and security of the mantle network. Could you elaborate on this, perhaps with a brief comparison to other blockchain platforms, if possible?