This reports the percentage of satellite bandwidth saved as a direct result of IP header and payload compression. This is the return-on-investment metric for the modem's compression engine on this specific link; a dropping percentage suggests the current traffic mix, such as already-compressed video or encrypted VPN traffic, isn't compressible, pointing to a different fix than tuning compression settings. For example, savings dropping from 40% to 5% after a site starts routing traffic through a VPN would flag that encryption is defeating the modem's payload compression.