Sets SharedAccess to Manual and stops it now. ICS lets this PC share its internet connection out to other devices (turning it into a router/hotspot). Unless you actually do that, it idles in the background. Manual rather than Disabled means it can still start on demand if you enable Mobile Hotspot, so nothing breaks. Reversible.
MaxTweaks applies this tweak with one click and snapshots your original setting first, so you can revert it cleanly at any time. A System Restore point is offered before batch changes, and every tweak links to its official source.
Get MaxTweaksOfficial documentation: https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/sc-config