Money Transfer can be either referred as Bank/Wire Transfer (transferring funds straight from your bank account) or as Cash/Money Transfer and it allows you to deposit funds into your account by using your local banking system.
Wire Transfer are extremely secured transactions which give you the option to deposit large amounts of funds at once (with only one transaction - up to $20K) and most online casinos will gladly offer you this option as a withdrawal method as well.
The deposit process using a Wire Transfer goes straight from your bank account and can be used world-wide by the local currency of the player straight to your casino account. If you use your local currency the funds will be converted to the chose currency as you set as default once you submitted your deposit into the casino cashier.
The Wire Transfer can be sent using your online banking account or by using a cash deposit at your local bank branch.
Although its many advantages, Wire Transfer takes time till the transaction gets approved from the casino cashier side, usually between 2 to 5 business days, so that's the time it would take for you to start playing on your deposited amount.
note: please check your casino of choice or your bank for extra fees and/or additional costs revolving the usual Wire Money Transaction.