How has e-marketing become an integral (important) part of marketing in today's society?

E-Marketing=Home shopping, saving time, discounts. Who hates this?

People are using the internet more than ever. New apps are coming out everyday and people are using them. Instagram is a great app do market/promote on because so many people are using it. You could post an ad on a streetlight and the exact same add on Instagram and the sales between the two would be very different. Social media and internet is a commonly used thing. With so many people on it, someone will see what you're marketing and want it.