What is paypal and how does it work?

Can yu tell me bout paypal

PayPal is an e-commerce business allowing payments and money transfers to be made through the Internet. It serves as an electronic alternative to traditional paper methods such as cheques and money orders. PayPal performs payment processing for online vendors, auction sites, and other corporate users, for which it charges a fee. It also charges a transaction fee (3.4%) on private individuals receiving money and an additional per transaction fee.

Source: http://en.wikipedia.org/wiki/PayPal

What do you want to know about it?
It's like a bank account online. You put money in it and can easily shop over the net without a credit card number.

ok, so how to yu attain 1 of these...