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What Size Of Body Section Ranks Highest?
by Jon Ricerca
This is another one of the controversial questions in
many of the SEO (Search Engine Optimization) forums, yet
it is very easy to answer for any particular search
engine.
While popular belief seems to be that pages should be very
short (less than 10K) to rank well with the leading search
engine, this article conclusively answers that question~
with a completely different answer.
The methodology is really quite simple for this question.
I gathered the results of the queries naturally performed
last month by myself and three associates using Yahoo and
Google. I then visited each page and wrote down the size
of the body section of the page. Those sizes were then
tabulated for the top 20 rankings and converted into a
normalized "ranking correlation".
The resulting number shows each group of body section
sizes normalizing into a number between -100 and +100
showing the likelihood of being ranked higher/lower. A
value of +100 shows that all 10 rankings were in the
proper order to show that pages of the studied size ALWAYS
rank HIGHER than pages of another size. A value of -100
shows that all 10 rankings were in the proper order to
show that pages of the studied size ALWAYS rank LOWER than
pages of another size. Numbers in between show the varying
likelihood of rankings proportionally between -100 and
+100.
That is the number you see on the Y-axis. On the X-axis,
we have groups of page sizes varying from 0 to >100K
bytes. Here are the graphs for Yahoo and Google:


There is an obvious correlation on Google, which shows
that body sections of a size between 50K and 60K generally
rank much higher than shorter or longer bodies. The Yahoo
graph is a bit more erratic, but also shows a nice peak at
60-70K (and another one at 20-30K). This goes against the
popular belief that states that shorter pages rank
highest. The popular belief is shown to be completely
inaccurate with this study.
Notes:
1. For the purposes of this test, the actual body section
size in bytes was used. The page was saved to disk and
then everything before the body tag and after the end body
tag were deleted. The resulting size of the file as
reported by the operating system was used. Graphics and
any other external references were completely ignored.
2. Over 1,000 queries and over 10,000 sites were examined
for this study.
3. There was no exercise to attempt to isolate different
keywords. I merely took a random sampling of the queries
performed by myself and three associated during the prior
month.
Conclusion:
Pages with a body section size between 50K and 70K rank
best on the two leading search engines!
This is merely a correlation study, so it cannot be
determined from this study whether the leading search
engine purposefully entertains this factor or not. The
actual factors used may be far distant from the factor we
studied, but the end result is that this search engine
does, in fact, rank pages between 50K and 60K higher than
pages of other sizes.
-----------------------------------------------------
Jon Ricerca is the lead researcher and author of the
Search Engine Ranking Factor (SERF) reports at
SearchEngineGeek.com. For access to the other SERF
reports, please visit:
http://www.SearchEngineGeek.com
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