What is Grey hat SEO, Why it is required? All Questions › Category: Search Engine Optimization › What is Grey hat SEO, Why it is required? 0 Vote Up Vote Down CS Electrical And Electronics Staff asked 3 years ago I need short information. 1 Answers 0 Vote Up Vote Down Anonymous answered 3 years ago Grey hat SEO is a kind of SEO that is neither black nor white. This is a technique that does not fully use the black hat SEO and rather combine both.