For players, this function is the "invisible reporter." When a game crashes and sends a report, Valve’s backend aggregates these files. Developers can then visit their Steamworks Partner dashboard to see which crashes are affecting the most people.
If you are a game developer seeing this error in your own title, you may be misusing the Steam API crash handler. SteamAPI WriteMiniDump
“I know what you did. The mini-dump. Why?” For players, this function is the "invisible reporter