Planet13 - 2:42 pm on Jul 3, 2013 (gmt 0) [edited by: Planet13 at 3:03 pm (utc) on Jul 3, 2013]
Did you change the internal in-content links and navigational links to point to the new page?
Yes, I changed those links to point to the new file name (blue_widgets.html)
However, fearing a penalty to the OLD PAGE, I did NOT do 301 redirects to the new page
Are the in-content links on pages which are topically closely related?
I would say yes, they are. It is hard to give an example here, but I would say so. However, as Robert Charlton brought up in the post after yours (read below for further discussion), it is a commerce page and people coming FORM an informational page might expect the link to go to an informational page.
One thing I should clarify; I only had about four of what we might call in-content text links pointing to that page.
However, I also had graphic "ads" to that page on about 35 pages. They were graphics that basically said, "Buy a blue widget today, save 10% off" I did those ads to drive traffic to that page.
However, I believe I did that recently, after I had falling out of the search results for the term "blue widgets"
How are those pages performing?... Are they affected by any of these algorithmic animals?
They were hit hard by Penguin 2 (down about 30%) They still are my better performing pages, and were previously ranked #1 or 2 for their key words. They did and still do get the lion's share of landing page traffic. Just that traffic is down 30% now.
according to google WMT, my whole site lost 35% of impressions and clicks on Penguin 2, and traffic is down about 35% as well (according to google analytics and statcounter).
[edited by: Planet13 at 3:03 pm (utc) on Jul 3, 2013]