Save the Environment
You would not need to drive to the supermarket or high street. There will be less vehicles on the road and this will help in reducing cO2 emissions.

Save time
A lot of time is wasted traveling, looking for a parking lot or comparing prices between different retailers. Shopping online saves you loads of time as there no traveling involved and you can compare prices easily just at the click of the mouse.
You can also shop at anytime of the day or on any day of the week. Online shops are open 24/7. You can spend your prime time doing things that are important and urgent and then shop online at your leisure.

Save money
Online shopping has the added advantage of letting you look for best buys. You can compare prices easily or look for better make of a particular product. Moreover online stores have less overhead charges and on the whole you get the same item for less online.