Blackhat SEO is a technique that makes use of less than legitimate strategies for achieving results. Search engine optimization can be black hat or white hat. White hat SEO has rules to be followed and techniques to be approved for improving a site search ranking. Meanwhile, black hat involves someone cheating to obtain similar results.
Today, a lot of techniques are regarded as legitimate black hat SEO. Black hat techniques are utilized for increasing search results SEO. But some individuals abused such methods and cause other internet users some problems. This is the reason search engines immediately disapprove the methods with the SEO community in general frowning upon them.