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Online retailers are the people who sell directly to users.
Marketing is done through the following ways!
1. Endorsement By Celebrities: This is technique whereby, retailers identify a certain celeb, They then get in to an agreement whereby they use their social media profiles to market a given product.
2. Advertising: Retailers take advantage of advertising platforms like adsense to market their products.
3. Referral Programs. In this method, people gain a small commission for every person they introduce to the retailers or for every transaction successfully completed.
4.Search Engine Optimization. Its the technique whereby The content in their website is optimized for search engines in a manner that they can get more people visiting their websites thus increasing the number of potential customers being reached.
There are many other marketing methods like:
5. Email Marketing:
6. video Marketing
7. Blogging etc.
You can read more on this link http://tommy.ismy.name/14-types-of-online-marketing/#.VX_1nUZ1Bf4
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