A globally distributed data plane
The proxy used to run in one place. If your agent ran in Singapore and the proxy sat in Virginia, every round trip paid for the distance twice.
It now runs across a global footprint (12 regions today) and a connection is routed to the nearest one. Region names follow the familiar convention, so us-east-1 and eu-central-1 mean what you expect. The connection string does not change: the same host reaches whichever region is closest to the client that dialed it.
Your database has not moved, so this does not shorten the hop from the proxy to your primary. What it removes is the detour on the way in, which is the part you were paying for on every statement.