Web.com

How do you know if someone has bought something from their shop in webs.com?

My friend has opened a free website and made ​​a store webs.com list your product and your Paypal account connected to it (that staff). How will you know when someone buys something and that their address is?

You know that someone has bought a product when you receive notification from PayPal. Complete the shipping information on the site PayPal as well.