It is unusual for a hotel to deposit money into your bank account after your stay unless there was an error or specific circumstances involved. Here are a few possible explanations for the unexpected deposit:

1. Refund or Overpayment: The hotel may have accidentally overcharged you during your stay or made an error in the billing process. The deposit could be a refund of the excess amount or a correction of the mistake.
2. Deposit Authorization: Some hotels may place a temporary hold or authorization on your credit or debit card when you check in. This hold is to cover potential incidental charges, such as room service or damages. After check-out, the hold is released, and the funds are returned to your account. However, it is unusual for the hotel to deposit the hold amount directly into your bank account. Typically, the release happens automatically, and the funds become available for use again.
3. Compensation or Special Offer: In some cases, hotels may offer compensation or special promotions to guests for various reasons, such as inconveniences during their stay or as a gesture of goodwill. If you had any issues or complaints during your stay, the hotel might have decided to compensate you by depositing funds directly into your account.

It is recommended to contact the hotel directly to inquire about the deposit and seek clarification. They will be able to provide accurate information regarding the specific reason for the deposit and address any concerns or questions you may have.