This article explains a couple of ways to receive money into your PayPal account. One is via email and one requires a PayPal.Me link. It includes information about fees related to receiving money and transferring balances.
Receiving money through PayPal is as easy as having an email address. When someone sends you a payment, you will receive an email from PayPal notifying you of the transaction. The money will automatically be added to your available PayPal balance.
Another way to receive money on PayPal is by sharing a PayPal.Me link. PayPal.Me allows users to share a URL instead of an email address to receive payments. This is useful for merchants who prefer not to give out their email address to customers.
If you have a PayPal account, you can create a PayPal.Me link by following these instructions.