After you understand what an SEO is, you may stimulate interest in the SEO ;  you may ask what is  needed to master to learn SEO in the end? In fact , SEO is not as mysterious as you have thought, and also is not related to hackers .  Put simply , you must let your SEO website have a  very good "communication” with search  engine  first , be sure Search engines  can  give  appropriate recognition of your website .If  search  engines  can not  find  your  website ,  it let alone rankings .  Since  each  search engine  is a need  to  adopt a way to find your website .  This  requires  your  website  in accordance with certain rules ,  if not ,  just like the Chinese clich " do not have to meet if not known . "  Of course, this alone understanding is not enough; you should master the following knowledge:

1、 understand how search engines crawl website pages and Index

You need to know some basic principles of search engines, the differences between each search engine, how does search robots (or web crawler) worked, how does search engines ranked search results, and so on.

2、Meta tag optimization

Mainly include theme (Title), a site’s description (Description), and the keyword (Keywords). There are some other hidden words such as Author, Category (directory), and Language (coding languages).

3、How to select Keywords and placed them in the websites

Searching has to use keywords. Keywords Analysis and choice is the most important part of SEO. First of all, give the main Keywords of your website (usually not more than five words), then optimize these keywords, including keywords density (Density), the correlation (Relavancy), outstanding (Prominency), and so on.

4、To understand of the major search engines

Although there are thousands of search engines, but just a few played a decisive role to the websites. Such as Google, Inktomi, Altavista. Different search engines have different rules to crawl pages and indexing. You also need to know the relationship between each search engine, For example, Yahoo and AOL web search using Google search technology, while MSN is using Looksmart and Open Directory technology.

5、 A leading Internet directory

Yahoo itself is not a search engine, but a large website catalog; it’s also not an Open Directory. Their main differences with search engines are the way to collect websites’ content. Directory is manual editing, which collect websites’ homepage; Search engines are automatically collected, Apart from Homepage, It also crawls a large number of content pages.

6、PPC(pay-per-click) Search engines

Search engines also need to profit, as the Internet business becomes more mature, the search engine charges also beginning to flourish. The most typical one is Overture, of course, including Googles advertising project Google Adwords.More and more people through search engines’ pay-per-click advertise to position commercial websites, and there are a lot of knowledge about optimization and rankings, you have to learn how to use the least advertisement and win the most click.

7, search engines Login

After you have build a website, don’t to lay there waiting guests to heaven. Let others find you; the simplest solution is to submit your website to the search engines. Although free is no longer the mainstream of the Internet (at least is in the search engine)-if your website is commercial website, the major search engines and directories will ask you to pay for index(for example, Yahoo asked for 299 U.S. dollars), But the good news is (at least so far) the largest search engine Google is still free, and it dominates over 60% of the search market.

8、link exchange and Link Popularity

 Website content linked to each other through HTML (Hypertext),as well as the website. In addition to search engines, people through different links between the website to Surfing daily. The more inbound link you get, the more traffic you will get. More importantly, the more external link your website has, search engines will think it is more important, and give you a higher rank. So, you have to spend a lot of energy to exchange links with others. Reference article: Link Popularity (Link Popularity)