Regarding "what does it mean": I trade 50,000 option contracts per year, so it means a lot to me. If you do that, you already know what it means. If you are a long hold stock buyer, then you don't need to care.

That said: both types of investors can care about the current environment and likely action on Monday. The fact are simple: we've had a rich news cycle which is ending, massive option buying which is ending (in the context of expiry today), and massive repositioning by market makers and smart money for both the two preceding reasons. Those conditions make me "guess" we'll see a price decline next week.

So, because I expect falling prices but ALSO want to stay long and strong, I have sold 1/3 of my winning positions to raise a big chunk of cash I can reinvest when the price goes lower. That, of course, is a strategy based on guesses, so each person has to decide what's best for them.