What is the big deal about “Clovis” people?
The oldest American cultural group for which there’s ample artifacts is the Clovis culture. There are those who say they were the first in and no one came in later, those are the “Clovis-first-and-only” folks.
Because they were total badasses. They thrived in the world of MEGAfuana.
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https://www.youtube.com/watch?v=jKZyrdIdUHc
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https://www.youtube.com/watch?v=zzShcS9AWkA
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https://www.youtube.com/watch?v=BA1BKkwcjGg
In addition to what others have said, their points were very sophisticated. The bi-faced, fluted points would have taken a ton of skill and when the Clovis people stopped making them, the technology that came after was far less sophisticated.
Think of Roman tech compared to dark ages tech.