Friday, July 01, 2011
Like any curious netizen, I have a Google Alert set up to email me whenever my name is mentioned online. Usually I get a slow trickle of my forum posts, blog posts, and tweets. But by far the most popular topic of these alerts over the past couple years has been my off-handed mention that we removed PageRank distribution data from Webmaster Tools in one of our 2009 releases.
The fact that people are still writing about this almost two years later—usually in the context of "Startling news from Susan Moskwa: ..."—really drives home how much PageRank has become a go-to statistic for some webmasters. Even the most inexperienced site owners I talk with have often heard about, and want to know more about, PageRank ("PR") and what it means for their site. However, as I said in my fateful forum post, the Webmaster Central team has been telling webmasters for years that they shouldn't focus so much on PageRank as a metric for representing the success of one's website. Today I'd like to explain this position in more detail and give you some relevant, actionable options to fill your time once you stop tracking your PR!
In 2008 Udi Manber, VP of engineering at Google, wrote on the Official Google Blog:
The most famous part of our ranking algorithm is PageRank, an algorithm developed by Larry Page and Sergey Brin, who founded Google. PageRank is still in use today, but it is now a part of a much larger system.
PageRank may have distinguished Google as a search engine when it was founded in 1998; but given the rate of change Manber describes—launching "about 9 [improvements] per week on the average"—we've had a lot of opportunity to augment and refine our ranking systems over the last decade. PageRank is no longer—if it ever was—the be-all and end-all of ranking.
If you look at Google's Technology Overview, you'll notice that it calls out relevance as one of the top ingredients in our search results. So why hasn't as much ink been spilled over relevance as has been over PageRank? I believe it's because PageRank comes in a number, and relevance doesn't. Both relevance and PageRank include a lot of complex factors—context, searcher intent, popularity, reliability—but it's easy to graph your PageRank over time and present it to your CEO in five minutes; not so with relevance. I believe the succinctness of PageRank is why it's become such a go-to metric for webmasters over the years; but just because something is easy to track doesn't mean it accurately represents what's going on on your website.
What do we really want?
I posit that none of us truly care about PageRank as an end goal. PageRank is just a stand-in for what we really want: for our websites to make more money, attract more readers, generate more leads, more newsletter sign-ups, etc. The focus on PageRank as a success metric only works if you assume that a higher PageRank results in better ranking, then assume that that will drive more traffic to your site, then assume that that will lead to more people doing-whatever-you-want-them-to-do on your site. On top of these assumptions, remember that we only update the PageRank displayed on the Google Toolbar a few times a year, and we may lower the PageRank displayed for some sites if we believe they're engaging in spammy practices. So the PR you see publicly is different from the number our algorithm actually uses for ranking. Why bother with a number that's at best three steps removed from your actual goal, when you could instead directly measure what you want to achieve? Finding metrics that are directly related to your business goals allows you to spend your time furthering those goals.
If I don't track my PageRank, what should I be tracking?
Take a look at metrics that correspond directly to meaningful gains for your website or business, rather than just focusing on ranking signals. Also consider metrics that are updated daily or weekly, rather than numbers (like PageRank) that only change a few times a year; the latter is far too slow for you to reliably understand which of your changes resulted in the number going up or down (assuming you update your site more than a few times a year). Here are three suggestions to get you started, all of which you can track using services like Google Analytics or Webmaster Tools:
- Conversion rate
- Bounce rate
- Clickthrough rate (CTR)
A "conversion" is when a visitor does what you want them to do on your website. A conversion might be completing a purchase, signing up for a mailing list, or downloading a white paper. Your conversion rate is the percentage of visitors to your site who convert (perform a conversion). This is a perfect example of a metric that, unlike PageRank, is directly tied to your business goals. When users convert they're doing something that directly benefits your organization in a measurable way! Whereas your PageRank is both difficult to measure accurately (see above), and can go up or down without having any direct effect on your business.
A "bounce" is when someone comes to your website and then leaves without visiting any other pages on your site. Your bounce rate is the percentage of visits to your site where the visitor bounces. A high bounce rate may indicate that users don't find your site compelling, because they come, take a look, and leave directly. Looking at the bounce rates of different pages across your site can help you identify content that's underperforming and point you to areas of your site that may need work. After all, it doesn't matter how well your site ranks if most searchers are bouncing off of it as soon as they visit.
Clickthrough rate (CTR)
In the context of organic search results, your clickthrough rate is how often people click on your site out of all the tim