Published on April 21st, 2017 | by bitcoin0
Learn to buy/sell Bitcoin for free; Show HN on Testnet
This is how many Bitcoin transaction confirmations you will wait until the seller (be it you or your counterparty) can safely proceed with sending the payment.
Beware that you should manually adjust (perhaps increase) the payment window if you increase the number of requried confirmations.
That way, the contract won’t be prematurely automatically canceled.