I tweaked the branding text on the top left to make it a bit more useful for everyone. It should now show when the game was last updated/built. This is for you, so you can see how old the version of the game you're playing is.

Below is for us, so in screenshots of errors we can see what OS, steam build ID and branch you're on. The steam build ID isn't working at the moment, I need to talk to Valve about it.