You could answer it this way:
Companies that have effective online marketing strategies have an edge from those that focus on offline strategies: they have access to millions of target customers online.
Whether the customer is based in New York or lives thousands of miles away, say in Tokyo, people just need to log on to the Internet and type your website address and voila—they already know about your business and what products and services you are selling. That’s one thing offline marketing cannot do.
With less money and less efforts, Internet marketers can reach large numbers of people unlike offline marketing. Companies do not have to spend tens of thousands of dollars to mount expensive campaigns online, especially if the Internet marketing in place is efficient and targeted correctly.