When you log in to your Coinapult wallet, the first interface you see will display a bitcoin address. This bitcoin address is your public bitcoin address and is unique to you. You can generate as many new public bitcoin addresses as you would like at no cost. In fact, it is recommended that you try to use a new address for each transaction.
Share your public bitcoin address with anyone who will be sending you funds, much like you would use an email address. The sender can either use the alphanumeric string or the corresponding QR code generated on the Receive page of your wallet.
You can visit the Transactions page in your account to view any incoming transactions. Note that Coinapult waits for two blockchain confirmations before crediting incoming transactions.