Post-Panda Experiment Notes

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I stumbled across some notes I took in 2011 after Google introduce their Panda update. This update really hit hard, and I was looking for a way to recover. To put things in perspective, this site saw a 35% decrease in traffic after the Panda update.

What makes this experiment so interesting is that it relates specifically to my views on the Tech Messages category. Even then, I realized that this category wasn't helping me much. As you might recall, I finally nixed all posts in that and the Security Updates category earlier this week.

So, here are my notes from 2011 regarding an experiment that I was starting. I never really finished what I was doing, so the notes trail off at the end.

This post-Panda article on Search Engine Land got me thinking about the change.

Google’s Panda update supposedly does not like pages that add little value to the site. This made me think that my "Tech Messages" pages on are probably of little use. The experiment is to take controlled steps to remove "Tech Messages" from Google’s index.


  • There are 235 tech-messages articles out of 1219 total articles published. This is 19%.
  • Google Analytics reports 72 pageviews (0.23%) for content that matches ^/tech-messages/ for the period 2011-03-25 through 2011-04-24.
  • Today I removed the tech-messages category from the sitemap.
  • According to Google Webmaster Tools the sitemap.xml had:
  • 1243 submitted URLs
  • 826 URLs in web index, before the change.


  • Googlebot downloaded the new sitemap.xml today.
  • According to Google Webmaster Tools:
  • 1012 Submitted URLs
  • 746 URLs in web index


  • Google Analytics reports 46 pageviews (0.15%) for content that matches ^/tech-messages/ for the period 2011-04-29 through 2011-05-29.
  • That’s a decrease of 43.90% over the last 30 days.
  • Total site pageviews decrease 4.64% over the same time span.
  • There are 415 Security Update articles out of 1,233 published articles. This is almost 34%.
  • Google Analytics reports 52 pageviews for content matching ^/security-updates/ for the period 2011-04-29 through 2011-05-29. This is 0.17% of total site traffic.
  • Before the change, Google Webmasters reports the sitemap.xml had:
  • 1,023 submitted URLs
  • 740 URLs in web index


  • According to Google Webmaster Tools:
  • 607 Submitted URLs
  • 557 URLs in web index

Next step will be to block in robots.txt.

And that's where I apparently stopped working on it. As we know from my previous post, removing all those posts really cut down the amount of useless crap posts on this site. (The question of how useful the remaining stuff is may still be up for debate.)

At one time, external links supposedly leaked "link juice" from your site. I don't think things are nearly that simplistic anymore, but realistically, outdated posts that just linked to things I found interesting, or security updates for operating systems that no one uses anymore just take up unnecessary space. Good riddance to bad rubbish.

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