Daily Search Forum Recap: August 20, 2009 | Main | Bing Search Results In Google

Can A/B Testing Cause An SEO Problem?

A/B testing is the process of setting up two or more styles for a page, for the same piece of content. For example, let's say you had a page where you sold blue widgets and you wanted to try using a blue button versus a red button to buy the widget. What you can do is A/B test the two types of buttons against each other.

How would you accomplish this? Well, you can send 50% of your traffic to example.com/widget.html?button=red and the other 50% to example.com/widget.html?button=blue and see which page converts better. But that can lead to duplicate content, i.e. the same URL, example.com/widget.html with three URLs for the same content. Or would it? Google and some search engines are smart enough to pick up on this. There are other ways to test this using JavaScript (potential cloaking issue?) or CSS or use Google Website Optimizer.

How would you handle it? That is the question asked in a WebmasterWorld thread. Honestly, I am not sure what the "best" method to handle this is. So please join the thread or comment here.

Forum discussion at WebmasterWorld.



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posted rustybrick in Search Engine Optimization at August 21, 2009 8:33 AM Comments (7)

Comments

Blocking the test URLs via robots.txt works well.

 

I'd test however I wanted (whatever works best and is easiest) and generally not let fear of search engine trouble slow me down.

 

no index, follow tag on test page(s).

 

Google Website Optimizer works well for A/B testing.

 

Once more...
What about using link rel="canonical" ? That could help.

 

Since this is an ecommerce site, cookies are presumably used to store session state.

I would use "one" page, and set a cookie with the testing information in it.
(buybutton=blue)

Otherwise you could write each ip address, timestamp, and button used to a testing table, and work backwards to tally things up.

"201.32.451.16","08/24/09","red button"

no *seo problem* whatsoever.

 

I agree with Jill, set up a split test that works best for you and your business, do not fear of search engine problems from the start. With Logaholic Web Analytics (available from www.logaholic.com) you can set up a URL based or PHP A/B split testing tool in seconds and observe the results in a couple of days.

 

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