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Bill Slawski at SEO by the Sea has an interesting post which gives an insight into how Google's Blog Search ranks its results. He has come across a patent application by Google which explains some of the ranking factors.

The patent application, 'Ranking Blog Documents', shows how Google ranks blogs according to searchers' queries based upon a combination of relevance and quality scores.

Positive ranking factors include:

  • How many blogrolls list the blog - especially from high-quality blogrolls or blogrolls of respected bloggers.
  • Links from other sources - including mail and chats.
  • How well tags are used to categorize a post.

  • PageRank

  • The number of subscribers to your blog feed -  using data gathered from feed readers.
  • Clicks in search results.

Factors which may have a negative effect on ranking:

  • Automated posting - an anti-spam measure.
  • Different content between the site and the feed - an indication of a low quality/spam blog.
  • The amount of duplicate content. 
  • Using words and phrases that appear frequently in spam blogs.
  • Posts that have identical size.
  • Linking to a single web page -  "If the number of links to any single external site exceeds a threshold, this can be a negative indication of quality of the blog document."
  • The location/quantity of ads - if ads are seen in the recent posts of a blog, they could be considered a negative quality factor.

blog@e-consultancy.com

Graham Charlton

Published 20 March, 2007 by Graham Charlton

Graham Charlton is the former Editor-in-Chief at Econsultancy. Follow him on Twitter or connect via Linkedin or Google+

2565 more posts from this author

Comments (1)

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Shane - Epiphany Search Marketing

This is an interesting point: "If the number of links to any single external site exceeds a threshold, this can be a negative indication of quality of the blog document."

Surely most corporate blogs will link through to a main site from all pages, could this be considered poor form in Google's eyes?

over 9 years ago

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