ERC token with super low gas fees?

Im sure the ether pros will call me a noob for asking this but from what I understand AVAX is on the ETH block chain so how does it have such low gas fees? I heard of a ERC (protocol... idk what u would call it its erc something like an erc 20 or an erc 721, its an erc token i just don't remember the number that comes after "erc") token that runs off the ETH blockchain but doesn't have those dreaded ETH gas fees. If anyone can enlighten me that would be great or if someone wants to call be a complete dummy thats fine too, I'm not a super noob to crypto but I just don't know that that much in depth into ether