Black-hat SEO tactics include keyword stuffing, hidden text or links, cloaking, buying links, and using private blog networks (PBNs) to manipulate search engine rankings.
Cloaking Doorway pages Blog comment spam Link farms Hidden text Sneaky redirects Copied content Invisible text Paid backlinks Paid links
Comments
Hidden text
Cloaking
Blog comment spam
Article spinning
Link farms
Private blog networks
Duplicate content
Negative SEO
Rich snippet abuse
Paid links
Doorway pages
Buying links
Hidden keywords
Poor quality content
Link schemes
Cloaking
Doorway pages
Blog comment spam
Link farms
Hidden text
Sneaky redirects
Copied content
Invisible text
Paid backlinks
Paid links