What is internet connectivity? How is it important in to days business would with respect to materials requirement planning & purchasing? Explain with examples?

Connecting the world and bringing the world internally for the individuals individually for various activity.. It is quite important now-a-days for almost all the practices.
Even for the planning and Purchasing.. Planning is varied for country with country. With the help of internet, you can view world wide planning.. You can make online purchase. You can sell your products in online.. You can advertise utmost for colorful appearance for your products... Example:If you get into a website, you can see some many advertisements with regard to so many world wide products...before signing into that website..