The process of optimizing a website – as well as all the content on that website – so it will appear in prominent positions in the organic results of search engines. SEO requires an understanding of how search engines work, what people search for, and why and how people search. Successful SEO makes a site appealing to users and search engines. It is a combination of technical and marketing.
Google PageRank algorithm takes into consideration the sources and the number of web page backlinks, then estimates the importance of that page. That is why when you try to search for some goods, information or service, Google and other search engines present website links in a concrete order (from the most valuable to the least important ones). Backlinks help your website attract a primary audience.
Going into network marketing? Understand that if you're not close to the top of the food chain there, your ability to generate any serious amount of income will be limited. Be wary of the hype and the sales pitches that get you thinking that it's going to work the other way. Simply understand that you're going to have to work hard no matter what you pick to do. Email marketing? Sure. You can do that. But you'll need a massive and very targeted list to make any dent.