Another way to put it is just "someone bought shares at this price." which isn't really news.

the private market uses lingo that is different from the public markets, and then brags about it if convenient to do so, such as for other clout. amounts undisclosed if not convenient, such as if its too low or a "down round" which just means "someone bought shares at a lower price than the last person" which is also not really news in the public markets, but supposedly damning in the private markets.

There are risks with huge valuations like this: you need to keep growing your valuation. Down rounds[1] can be a death sentence, especially as we're most likely entering a recession.

1: https://www.investopedia.com/terms/d/downround.asp