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Does Gmail Pass PageRank?

Posted in Uncategorized, SEO, Search, Experiments, Off-Page by Ryan on the February 25th, 2007

This question has resurfaced in the SEO-world, and in my world recently, and so I’d like to weigh-in. Here’s the latest situation presented to me:

My friend sent an email to 100,000 subscribers, of which 1,000 of them were GMail addresses, advertising “college widgets”. The link back to his site contained the anchor text “college widgets”. He went from ranking #10 in a Google search for [college widgets] to #1 in just a few days, then later he dropped back down to #4. I looked at my GMail account and the email page has a PageRank of the 7!

The first thing to understand is that the way the PageRank in your toolbar works, is that when it doesn’t find any data for your current page, it extrapolates an approximate value from the previous page you visited as well as the domain. Because the Google domain is a PR10, your toolbar extrapolates a PR7 for your mailbox.

So where did the resultant change in rankings come from?

Well, the page in question has a title tag whose first two words are “College Widgets”. The page also has 59,000 links pointing at it (according to Yahoo!) most of which are from the same domain, with the anchor text “college widgets”.

In a sample of 100,000 emails, I have to think that at least 1-3% would have the Google Toolbar installed. Add in the GMail subscriber base, and Google has 3-4 thousand pieces of user data to use about the page in question. I would estimate that amount of user data spread over just a couple days would be more than enough for Google to trigger a deeper crawl of the page, and potentially index or count more of the backlinks.

As RC mentioned, you can’t triangulate with only 2 points. Google uses user-data, it’s time to face facts and build your websites for users too.

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