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Link juice question
mirrornl




msg:4352854
 10:08 pm on Aug 17, 2011 (gmt 0)

Love this forum...:) simple question:

In theory:

If i have a page with only two outgoing, do-follow links,
and both have the same target,
only the first one will be counted.. right?

Will that link pass 100% or 50% of the link juice?

(if the anchor text is the same or different does not make any difference i think)

 

tedster




msg:4352901
 1:08 am on Aug 18, 2011 (gmt 0)

only the first one will be counted.. right?

Be careful running too far down the road with that particular bit of research. The testing was done using anchor text influence, not all of "link juice" Ihow would you test that, anyway?) Then a follow-up test used the "same" URL for two links but included a page fragment identifier on the second one (url#fragmentname). That second test found that BOTH links transferred anchor text influence.

deadsea




msg:4352910
 1:22 am on Aug 18, 2011 (gmt 0)

In some experiments I did (now more than a year ago), I tested how much link juice gets passed by duplicate links.

Here are three separate pages:

============
href="a.html" (single link passes pagerank)
============
href="a.html" (first link passes pagerank)
href="a.html" (second link passes NO pagerank)
============
href="a.html" (first link passes pagerank)
href="a.html#frag" (second link with fragment passes additional pagerank)

The results for pagerank passing are identical to the results for anchor text influence. I should probably test this again as this is subject to change at any time in any of Google's algo updates.

mirrornl




msg:4353009
 9:29 am on Aug 18, 2011 (gmt 0)

Thanks both!
Although Deadsee tested this a year ago:

href="a.html" (first link passes pagerank)
href="a.html" (second link passes NO pagerank)

it is still not certain i understand

goodroi




msg:4353016
 10:57 am on Aug 18, 2011 (gmt 0)

Link juice is not Pagerank. Those are two separate items that are both calculated using backlinks.

We don't even have a way to tell real Pagerank since Google only gives us Toolbar Pagerank which is out of date and has a history of being manipulated. IMHO each year the toolbar Pagerank tends to correlate less & less with high rankings.

deadsea




msg:4353017
 11:02 am on Aug 18, 2011 (gmt 0)

Link juice is not pagerank? I've always used the two terms interchangeably. To be clear, I measured Google pagerank in my experiments.

goodroi




msg:4353024
 11:23 am on Aug 18, 2011 (gmt 0)

Link juice is a generic term referring to backlinks. There are many ways to measure link juice (amount of unique ips, total volume of links, etc.). The term link juice is good for when you have to simplify the topic matter to help clients understand basic SEO. When doing research you probably want to better define the term so you can accurately measure the impact of your test.

Pagerank is a specific way to measure backlinks that was designed by Larry Page and patented for Google. Real Pagerank data is not shown to the public. We see Toolbar Pagerank (TBPR) which is a snapshot of Pagerank data taken weeks/months ago and Google has been known to manipulate it.

smithaa02




msg:4353169
 4:59 pm on Aug 18, 2011 (gmt 0)

This is a good question...

The gist of it is can you be throwing link juice into a black hole by duplicating page links? If I have a hundred 'juice points' and say a hundred links. All 100 go to pageb.html. Does pageb.html get 100 points (minus decay of course) or just one? If one, where did the 99 go? This juice is obviously very valuable as large websites interlink their pages a lot so their juice can ricochet around for quite a while before decay and external links sap the rest of the juice.

If duplicate links still count toward the link total by which google subdivides page juice, this would be quite worrisome... Anybody know the answer?

deadsea




msg:4353176
 5:14 pm on Aug 18, 2011 (gmt 0)

You do not throw pagerank into a black hole by duplicating links. Nofollow links throw pagerank into a black hole. Google seems to ignore duplicate links altogether. Its like they aren't in the page at all as far as google is concerned. They don't pass pagerank, they don't throw it away, its like the link doesn't exist to Googlebot. It has no effect on pagerank and it has no anchor text effect.

mirrornl




msg:4353198
 6:44 pm on Aug 18, 2011 (gmt 0)

Google seems to ignore duplicate links altogether.

so:
If i have a page with only two outgoing, do-follow links,
and both have the same target,
(e.g. the same link in the header and the footer)
the first one will probably pass 100% of link juice (or "real" pagerank),
and the second duplicate link has no influence att all?

bhartzer




msg:4353224
 7:46 pm on Aug 18, 2011 (gmt 0)

I should probably test this again as this is subject to change at any time in any of Google's algo updates.

Tests like this are always worth re-testing, about every 6 months or so.

I would also see if it ever stops being passed, and when? You tested 2 links on a page, how about 3, or 4 or even 10 or 20?

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