What is "Antivirus Engine Server"?

Hello! I have an Avast process called “Antivirus Engine Server” (aswEngSrv.exe). What is the function of this process?

Thanks.

See Reply #2 here: https://forum.avast.com/index.php?topic=225164.0

Presumably one would trust all processes identified as Avast s.r.o as trustworthy? Or not?

I would imaging that this file would also be digitally signed by Avast.