Gray hat SEO techniques are neither white SEO nor black SEO. These techniques are so-called gray because there are risks that go along with them. An example is purchasing links.

Google is against the sale or purchase of a backlink but there are many online pages, magazines and other resources that offer backlinks for a fee. Basically, the price of a text link depends on the authority of the linking page. An example of an unofficial benchmark of the average price for a text link is Google’s PageRank.

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