It tricks the operating system or Office suite into believing it has connected to an official company server, thereby "activating" the product for a set period (usually 180 days).
Using unofficial activators like KMSAuto Lite involves several dangers: Malware & Security
Using KMSAuto Lite 1.5.6 Portable is relatively straightforward:
If the software needs to be removed (e.g., to transition to a legitimate license):