There are many reasons why you might see a charge you weren't expecting.  You would need to reach out to customer service or check your account management portal for a summary.

However, here are some common reasons why you might have received a charge for a domain:

1. Domain Renewal: If you own a domain name, it needs to be renewed periodically (typically annually) to maintain ownership. Domain registrars usually charge a renewal fee to keep the domain active. If you received a charge, it might be for the renewal of your domain.

2. Domain Registration: If you recently registered a new domain name, you would have been charged a registration fee by a domain registrar. This fee is usually paid when you initially acquire the domain.

3. Domain Transfer: If you transferred a domain from one registrar to another, there could be transfer fees associated with the process.

4. Additional Services: Domain registrars often offer additional services such as domain privacy protection, email hosting, or website hosting. You might have received a charge for one of these services.

5. Auto-Renewal: Many domain registrars enable auto-renewal by default to ensure that domains don't expire unintentionally. If auto-renewal is enabled for your domain, you'll be charged automatically when the renewal date approaches.

6. Mistaken Charge: It's possible that the charge was made in error. In such cases, you should contact customer service to inquire about the transaction and request a refund if necessary.

To determine the exact reason for the charge, you should check your email for any renewal or registration notifications, review your account activity with the domain registrar, and contact their customer support if you have questions or concerns about the charge. Additionally, reviewing your billing or credit card statement can provide more information about the transaction, including the name of the entity that charged you.