What is a VPN?

Public networks (like coffee shop or hotel networks) are often open networks. Do you use this type of network? What types of things do you do while connected to the network? Do you shop? Check bank balances? Pay your credit card? Do you know anyone who does any of these things? Is this safe? Why or why not?

2.Would not using a VPN be considered a bad idea while checking important information online? Explain why?

3.What is a VPN?