When you deal over internet or via call it is called Digital Marketing. There are thousand websites are available on internet where we buy or sell our necessary product, like Amazon is good example of Digital Marketing. Now a days If you want to explore your business, Digital marketing is good source. People prefer digital marketing because it safes time and money. Because of digital marketing a small shopkeeper is also getting good business. 
We advertise your business on different social and commercial sites. It helps you establish your business