Search Engine Optimization of a website means to optimize a website for specific keywords that the website ranks higher in search robots for keywords. A website when ranked higher in search engines by keyword, then it means that if a user opens Internet Google, the types of the same keyword in the search bar and click search, the website will in the most important pages of that particular search. SEO is very profitable for a website because if a site is search engine optimized for a particular keyword, then the site will get tons of unique visitors. There are different types of search techniques engine optimization.
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First is white hat SEO technique. This is the most reliable because the main objective of this technique is to write quality content. In this technique, the experts to write articles for people and not robots Google or other search engines. First place in this technique comes from the skills of marketing and quality content. SEO experts agree that "Content is king" and thus focus more on writing quality content rather than playing tricks to get listed in Google. This hat includes activities such as writing quality articles, submission to article directories senior public relations, participating in forum discussions, submitting website to search robots, etc.
Second is gray hat SEO technique. It is different from white hat. The concept of this hat is if they are willing to take risks, you will be rewarded. Buying links is an example of this hat. If Gray Hat SEO technique is applied wisely, it can not ban the site on Google and the site very soon will be rewarded with a good range of SE. The risk of being banned is low because this hat does not break any rules engine Google or Yahoo. The results are also achieved faster compared with the white hat.