What does 1000 cores mean?

Excuse me, could you please clarify something for me? I'm a bit puzzled about the term '1000 cores'. Could you explain what it means in the context of cryptocurrency or finance? I'm trying to wrap my head around the technical jargon but this one's really throwing me off. Is it related to processing power? Or does it refer to some kind of unit measurement? Any insight you could provide would be greatly appreciated.