Generally, we can see Internet marketer as Ads marketers
, Adwords Marketers, Affiliate Marketers, Article Marketers, Email Marketers, Web Service Marketers and so on.
Internet Marketing is just like offline manual marketing. To be a good marketer we need to be aware about NPS (Need, Products and Service). Find what is people's, your customer's need and get their needs and supply it to them. And then You are good marketer.