If you landed on r1---sn-hp57kndd.gvt1.com, you probably saw a 404 error page. That's because this domain isn't a website at all. It's a behind‑the‑scenes server node owned by Google, part of their content delivery network. The page has no content, no business, and no purpose for a regular visitor.
So is r1---sn-hp57kndd.gvt1.com a scam? No. The domain is hosted on Google's own network, uses a valid Google‑issued certificate, and shows up on no blacklists. But it's also not a site you can buy from, sign into, or read. Reviews or complaints about this domain would be meaningless — there's nothing to review.
What should you do if you see this URL? It's most likely an intermediate address used by Google services. If you were expecting a working page, try clearing your cache or checking the original link. There's no safety concern, just a dead end. Trust it as you would any Google infrastructure: it's legitimate but not intended for public use.