Joost published a blog post showing how some of the sites he
hit by Google Panda 4.0 and in one case, unblocking the CSS & JavaScript
resulted in the site returning to its normal rankings.
Joost wrote, "they’ve returned
on almost all of their important keywords. Just by unblocking Google from
spidering their CSS and JS."
Well, I have an issue with this for
a couple reasons:
(1) Panda is an algorithm and it
needs to run again for it to have an impact. So first, you need to
theoretically unblock your CSS & JavaScript, then wait for GoogleBot to
crawl to pick it up, then Google needs to process all of that, and then Panda
has to be rerun.
(2) I haven't seen enough evidence
from the community to prove this to work.
(3) More of his supporting evidence
is Google recommending you don't block CSS & JavaScript at SMX Advanced a
couple weeks ago. Google has been saying that for years and years. They just
keep saying it.
The truth is, a lot of sites that
may have benefited or took a hit from Panda 4 actually saw reversals a week ago
(last weekend). We have a story on that over here. So something did happen with
Panda 4 but Google would not chime in about that.
I think it is unrelated to the
blocking or allowing of CSS & JavaScript.
Robert Charlton, moderator of
WebmasterWorld, wrote in the WebmasterWorld thread:
He associated a site's drop with its
accidental blocking of CSS and Javascript files. This was shortly after Google
had announced its new Fetch and Render feature in Webmaster Tools. Assumption
is that this is now being used in the page layout algorithm. Unblocking CSS and
JS appeared to produce quick recoveries.
This kind of association is entirely
consistent with algorithmic changes I've seen over the years, where Google has
been quick to make use of a capability that we first see in a reporting
feature.
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