I think the specific part you're referring to is Intel AMT (Active Management Technology) which allows the user to remote control into their computer. AMT is a module that runs within the Intel ME operating system.
Intel ME does a lot of things, like the below (we think, no one really knows for sure):
- Active Management Technology (AMT)
- Alert Standard Format (ASF)
- Intel Boot Guard (IBG)
- Secure Boot
- Integrated Clock Controller (ICC)
- Quiet System Technology (QST) / Advanced Fan Speed Control (AFSC)
- Protected Audio Video Path (used in PlayReady DRM)
- Intel Security Assist (ISA)
- Serial over LAN (SOL)
- Firmware-based Trusted Platform Module (TPM)
Intel ME does a lot of things, like the below (we think, no one really knows for sure):
Source: https://en.wikipedia.org/wiki/Intel_Management_EngineI think there is also some power management functionality in there too.