1. Its a bad back-link if the domain is not related and the anchor text is not relevant.
  2. Its a bad back-link if its coming the domains which are in a language other than that of your website.
  3. Its a bad back-link if its coming from a site which have a lower DA and PA than your own website.
  4. Its a bad back-link if it has been created using automated softwares.
  5. Its a bad back-link if its coming from from low authority sites or the sites that are blocked by search engines.
  6. Its a bad back-link if its coming from blog commenting.
  7. Its a bad back-link if it is coming from any of the following:-

• Links From Spun Content/Splogs
• Comment Spam
• Forum Spam
• Paid Links That Pass PageRank
• Low Quality Directories
• Links From Hacked Sites
• Links From Lots Of Foreign Language Sites
• Scaled Guest Posting
• Private Blog Networks (PBNs)
• Excessive/Non Niche Relevant
• Reciprocal Links
• Bad authority Site ( Bad health )

  1. If you are having do-follow links then see referring domains value for those links. If they are having powerful links they these are good links.
  2. All good type of links
    • Natural link
    • Niche Relevant
    • Anchor text link
    • Good authority site links
    • Submitting News Releases
  3. Its a good back-link if its coming from trustworthy and relevant website.