(or even 6-8 confirmations it depends the service you're using).
Normally those are for involving a larger amounts of payments.
Payments with 0 confirmations can still be reversed! Wait for at least one.1
One confirmation is enough for small Bitcoin payments less than $1,000.
3 - Enough for payments $1,000 - $10,000. Most exchanges require 3 confirmations for deposits.
6 - Enough for large payments between $10,000 - $1,000,000. Six is standard for most transactions to be considered secure.
60 - Suggested for large payments greater than $1,000,000. Less is likely fine, but this is to be safe!