Confirmation means that the transaction has been processed by the network and is highly unlikely to be reversed. Transactions receive a confirmation when they are included in a block and then for each subsequent block. Even a single confirmation can be considered secure for low-value transactions.
Although, for larger amounts like $1000 equivalent, it makes sense to wait for 6 confirmations or more. Each confirmation exponentially decreases the risk of a reversed transaction.

It usually takes about 20 minutes to finish a transaction.
You’ll have a Confirmation bar under your transaction history to inform you about your transaction status.