I see no difference between emarketing (electronic marketing), internet marketing as well as online marketing... Pretty much these terms are interchanged and mean the same thing...
There are alot of advantages with conducting your business online such as much lower operating/overhead costs as well as potential global reach...
Disadvantage compared to traditional marketing is largely removal of face-to-face discussion as well as being able to physically see a product prior to purchase...
This is a long subject but I am sure you get the idea.... there is of course tons of resources online discussing this so I'll stop there....
Emarketing tends to refer to the process of brand building for physical products using digital technology which would include social media management, sms marketing and a plethora of other things. The wretched recorded phone calls that you get promoting PPI and double glazing would all fall under the emarketing department so it is a broader term than internet or online marketing.
Nowadays it is becoming an essential part of the communication strategy of major companies because of the changing habits of people. The important 25-34 demographic is much less likely to buy a newspaper or watch TV than the 35-60 group and are more likely to consume their info on a mobile device. That means that traditional media doesn't reach them to the same degree.
Marketing done online via website or other online tools and resources called eMarketing. Its include direct email, SMS/text messaging, blogs, webpages, banners, videos, images, ads, social media, search engines, and much more.
eMarketing is the product of the meeting between modern communication technologies and the age-old marketing principles that humans have always applied. That said, the specifics are reasonably complex and are best handled piece by piece.
There is no such different in Electronic Marketing and Internet Marketing. Both work in the same ways and the outcome can be a little different because when we see how both work Electronic Marketing can has a vast term because there is a lot which comes in it. But in shorts both are almost same and can benefit you.