There are three types of SEO:
1. White Hat SEO
2. Black Hat SEO
3. Grey Hat SEO
1. White Hat SEO
White hat SEO is the technique to follow the rules of a search engine, visitors will see it and will return again.
2. Black hat SEO
Black hat SEO is a technique which is the opposite of white hat SEO.
Black hat techniques:
Keyword stuffing
Doorway and cloaked pages
Hiding text and links
3. Grey hat SEO
Grey hat SEO is a combination of white hat and black hat techniques.
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