A Bitcoin wallet is as simple as a single pairing of a Bitcoin address with its corresponding Bitcoin private key. Such a wallet has been generated for you in your web browser and is displayed above.
To safeguard this wallet you must print or otherwise record the Bitcoin address and private key. It is important to make a backup copy of the private key and store it in a safe location.
Add funds to this wallet by instructing others to send bitcoins to your Bitcoin address.
Check your balance by going to blockchain.info or blockexplorer.com and entering your Bitcoin address.