The deposit as well as the deductible are used to repair any damage that may have occurred.
Deposit
The deposit mainly covers possible internal damages which are not covered by the insurance (e.g. dirt, broken dishes, etc.). In contrast to the deductible, the deposit is paid BEFORE the rental and refunded if no damage has occurred. For details on the amount, payment methods, and how the deposit is collected and refunded, please see this article: How much is the deposit?
To track the status of your deposit, visit your customer account.
Deductible
The deductible is the maximum amount that a customer must pay per claim before the insurance company will cover the remaining amount. The excess is only due AFTER the occurrence of such damage.