What does 2 confirmations mean on Coinbase?

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Tags

1. #another
2. #until
3. #coinbase
4. #bitcoin
5. #confirmations
6. #which
7. #considered
8. #requires
9. #point
10. #unconfirmed
11. #block
12. #final
13. #confirmation
14. #transaction
15. #consider
16. #included
17. #blockchain
18. #additional