The LG G6 has started getting a new update in the United States. It's a large update that weighs in at around 640MB and is currently hitting unlocked units (US997).
The changelog doesn't reveal any details, except saying that the update improves the handset's usability and functionality.
Reportedly, Android security fixes for June are also included in the update. As is usually the case with OTA roll outs, it might take time for the update notification to pop up on your phone's screen.