The script only changes what you see on your screen. No one else in the server sees the fake 1M donation, and no actual Robux are added to your account.
Unfortunately, I have to warn you that this script is likely a scam. Here's why: roblox pls donate script fake donation 1m robux
Many sites offering "free scripts" or "1M Robux hacks" are actually trying to steal your login credentials or install viruses on your device. The script only changes what you see on your screen