Why Testing is Essential in SEO
“PageRank sculpting is dead” or “Search engine X doesn’t look at the meta keywords tag” or “Insert your favorite SEO catch-phrase”. A lot of times people in this industry get caught up in the hype of the new buzz topic, which I admit, I have. Something new and shinny is being talked about and it controls a lot of the talk in forums and on blogs. This year alone PageRank sculpting with nofollow was a big discussion. People used it, the search engines then said it didn’t work and then it was in the spotlight again. Did it really not work? It wouldn’t be the first time a search engine said something but the reality was different (Yahoo claiming they don’t use the meta keywords tag as an example).
There is a great article over at SEOMOZ posted by Danny Dover called Tests Show PageRank Sculpting with Nofollow Still Works. He outlines a test he did for nofollow:
The Experiment
We chose the following five PageRank sculpting methods to test:
Rel=‘nofollow’ – The standard mechanism for nofollowing a link. example
Link Consolidation – Consolidating low priority pages. You can read more about link consolidation here.
Iframe – Include a standard link in an iframe that is blocked via robots.txt or meta robots so engines can’t follow it.
Javascript – An external Javascript file (blocked from robots) that inserts links into divs when the page renders.
Control Case – Null test with standard links.
The post is worth a read through as it lays out a good test and shows the results. This test is more evidence that testing IS important. How can you say something works or doesn’t work if you haven’t tested it? Just because someone tells you something, or the search engines say something, that doesn’t really mean that is really what is going on. I think certain things also come in cycles as the algorithms change. Some minor element may not work today or might not have as much importance/weight put on it, but who’s to say it is going to stay that way? In Danny’s post he establishes 2 points at the beginning of his post that I also want to share:
1. There is overwhelming evidence that from a “ROI on time spent working” perspective, there is much more value in link building and creating content that is link-worthy than obsessing over search engine algorithm fluctuations like PageRank sculpting. Link building is human oriented and thus more inline with the long term goals of the search engines. Links also have the added bonus of being easy to measure and thus easier to prioritize.
2. We can’t directly measure how PageRank flows so we can only infer results. This needs to be acknowledged when interpreting test results. That said, we also can’t directly measure objects outside our solar system and this solution of inference has become the basis for modern Astronomy. (If it is good enough for NASA, it is good enough for SEOmoz ;-p)
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