Can I add USD to PayPal?

Hello, I'm curious about the process of adding funds to my PayPal account. Specifically, I'm wondering if I can add US dollars (USD) to my PayPal balance. Could you please elaborate on the steps involved in this process? I've heard that PayPal supports various funding sources, but I'm not sure if direct USD deposits are one of them. Additionally, I'd like to know if there are any limitations or restrictions on adding USD to PayPal, such as minimum or maximum amounts or specific bank requirements. Thank you for your assistance in clarifying this matter.