
Black Hat SEO Methods : Google is continuously changing and updating its searching algorithm for better results.
Don’t forget about keywords density.
In the context of search engine optimization keyword density consider as a factor in determining whether a web page is relevant to a specified keyword or keyword phrase or not.
Adding text to the website that can be only seen by search engine robots but readers can’t.
Cloaking is a process that returns a different webpage to search engine crawling the site.
Search engines can’t able to decide which is more relevant to a given search query, and therefore, will rarely show duplicate content.