A Bitcoin address is a unique identifier which allows you to receive Bitcoins. With PayPal you send funds to an email address, and similarly with Bitcoin you send funds to a Bitcoin address.

For example, this is one of our Bitcoin addresses:   1JArS6jzE3AJ9sZ3aFij1BmTcpFGgN86hA.

Please verify that you have copied the destination address exactly before sending Bitcoins to it. Bitcoin transactions are not reversible!