Why is Prime charging me monthly?

Excuse me, could you please clarify why I'm being charged a monthly fee by Prime? I've reviewed my account and I'm not sure what service I'm paying for. Could you provide some insight into the specifics of these charges and perhaps explain why they're necessary? I'd like to ensure that I'm getting the most value out of my Prime membership, so any additional information you could provide would be greatly appreciated. Thank you for your time and assistance.