What does a (# threads) to be considered in Activity monitor?

The pic is is from AM in # threads section.. tried to find an answer on apple.com .. but no luck there..
Did a search on here but all the threads that showed didn't answer my question..
See pic:
The pic is is from AM in # threads section.. tried to find an answer on apple.com .. but no luck there..
Did a search on here but all the threads that showed didn't answer my question..
See pic: