A zero - confirmation transaction means that exchanges, merchants, and other businesses are willing to accept a digital currency before the first network confirmation. (cryptotimes.news)
However due to the increased popularity of the Bitcoin network confirmation times have increased quite a bit and can sometimes take op to an hour or more. (captainaltcoin.com)
This will be fully confirmed and available for trading only after three Bitcoin network confirmations. (cryptocoinjudge.com)