What does online shopping mean?
"Online Shopping" refers to purchasing items over the computer, rather than at a store - in person.
There are many online stores to choose from and many many ways to find them.
For instance, if you regularly shop at Sears, JCPenny, Macys, or any of those large department stores, it is very likely that they have an online shop where you can have things delivered to your home rather than traveling to the store.
There are also large shopping websites like Amazon.com, Shopping.com, and Pricegrabber.com that work at finding an item from multiple online stores and sorting them by things like price, location, style, etc.
Most of these online stores take all major credit cards, not so much money orders, checks and cash.