why the ipAddress config is used

at the betterAuth we have config for ipAddress

ipAddress: {
            ipAddressHeaders: ["x-client-ip", "x-forwarded-for"],
            disableIpTracking: false
        },

ipAddress: {
            ipAddressHeaders: ["x-client-ip", "x-forwarded-for"],
            disableIpTracking: false
        },

ipAddress: {
            ipAddressHeaders: ["x-client-ip", "x-forwarded-for"],
            disableIpTracking: false
        },

ipAddress: {
            ipAddressHeaders: ["x-client-ip", "x-forwarded-for"],
            disableIpTracking: false
        },

what is the use of this can someone help?