Black Hat SEO is the use of SEO tactics which violate guidelines set by the search engines. They are examples of unethical marketing.

Tactics that are considered black hat include:

  • Paying for backlinks
  • Buying a website to acquire their domain authority
  • Keyword stuffing
  • Use of unrelated keywords
  • Hidden text and hidden links
  • Duplicate content and mirror sites
  • Cloaking
  • Doorway and gateway pages
  • Spam blogs and spam blog comments
  • Page swapping
  • Link farms
  • Cybersquatting