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Sure Fire Search Engine Optimization (In: General Search Engine Optimization)
Search engine loophole? (In: General Search Engine Optimization)
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sweetberry
Joined: Jan 12, 2004
# Posts: 48
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Posted: 2004-Jan-26 11:28
Hi
Can anyone tell me how does the presence of advertisements that are served up remotely by a third party affect search engine rankings? Can the spiders "see" such ads?
Thanks
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Eathan
Joined: Eons Ago
# Posts: 1362
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Posted: 2004-Mar-17 01:02
In most cases the third party ads are served via outbound javascript calls. Bots will see the call, but not the ads served.
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jbgilbert
Joined: Sep 16, 2002
# Posts: 321
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Posted: 2004-Mar-17 01:44
Supposedly, they have NO effect on rankings. I've seen it discussed at length, but have yet to see any real proof that they have either positive or negative effect at this point.
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Eathan
Joined: Eons Ago
# Posts: 1362
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Posted: 2004-Mar-17 20:30
That's correct, they should have NO effect on rankings. Think of spiders as browsers with script (and most everything else) turned off.
The only exception here would be if one engine decided to penalize pages hosting another engine's ads and specifically programmed their crawlers to look for those ad calls, but the overhead added to crawls vs rewards, if any, would seem prohibitive.
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greenleaves
Joined: Mar 21, 2002
# Posts: 720
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Posted: 2004-Mar-17 20:38
I shouldn't. However, I thought I had read something about one of the major SE's making an atempt to view Java's. It would be interesting to see the result of such a change in the spiders viewing of the world. 
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bhartzer
Staff
Joined: Jun 08, 2000
# Posts: 7042
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Posted: 2004-Mar-17 21:07
If there's an advertisement that's clickable on your page, then it's seen as an outgoing link. How could this not have any effect on rankings?
Certainly if you have too many outgoing links on your page (advertisements or not) then that would have an effect on rankings (a negative one).
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greenleaves
Joined: Mar 21, 2002
# Posts: 720
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Posted: 2004-Mar-17 21:56
"How could this not have any effect on rankings?"
I think we are reading this differently.
This is what I understood: if site-X has a 3rd person add (served up by a script) on site-Y and spider-Z reads site-Y, then the add of site-X on site-Y will not affect the ranking of Site-X. The spider cannot read the incoming link for site-X doe to the fact that the add of site-X on site-Y is a script link. This would mean that the ranking of site-X would not be affected. Am I wrong on this? If so, someone please tell me 'cuz this means a lot to me.
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Eathan
Joined: Eons Ago
# Posts: 1362
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Posted: 2004-Mar-17 22:34
bhartzer,
I'm referring specifically to third party ads served via script calls like Google Adsense.
At the right of this page are several Adsense ads. Now take a look at the source of the page. The ad copy, links, etc does not appear in the source. That copy is added by the browser as the page is rendered.
Since most spiders are essentially javascript disabled, they would only see the code below.
script type="text/javascript"
google_ad_client = "pub-9288128222348943";
google_ad_width = 120;
google_ad_height = 600;
google_ad_format = "120x600_as";
google_color_border = "B4D0DC";
google_color_bg = "ECF8FF";
google_color_link = "0000CC";
google_color_url = "008000";
google_color_text = "6F6F6F";
/script
script type="text/javascript"
src="http://pagead2.googlesyndication.com/pagead/show_ads.js"
/script
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bhartzer
Staff
Joined: Jun 08, 2000
# Posts: 7042
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Posted: 2004-Mar-17 23:13
Yes, most spiders are essentially javascript disabled. However, they will see this link:
http://pagead2.googlesyndication.com/pagead/show_ads.js
and they will see it as an outgoing link on the page. And they'll actually follow that link.
If you have too many outgoing links on your page it will have an effect on your rankings.
In regards to Google and Adsense specifically, Google uses Adsense data when determining rankings.
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Eathan
Joined: Eons Ago
# Posts: 1362
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Posted: 2004-Mar-18 00:12
That's an interesting point, but I don't think it's correct.
I guess there would be two questions there; do spiders pay attention to what they find between script tags, and is "src=" treated the same as "a href="? I think both answers are no, but you can never be 100% certain with SEO issues.
I've always operated with the idea that spiders totally ignore what they find between the script tags, but after reading your post, I did some poking around.
First I tried searching for the domain included in the adsense script, or sites linking to it. I couldn't find any results that were listed just for having the URL in a javascript call. I thought I had found one on AV, but it had it outside the script tags in an href as well. I also searched for "google_ad_client", but again, all the results had the phrase outside the script tags.
Has anyone ever ranked for something only found in a script tag on their page (not in inbound links either)?
The domain also has a PR of 0, so I can only conclude that, in this case, Google at least, either isn't treating "src=" the same as "a href=" or is ignoring the content of the script tags. Of course it's a Google domain, so may be treated differently...
Like I said, can't be 100% certain, but I've never found any evidence to suggest that serving third party ads like the adsense ads on this page could adversely affect your rankings. If anything, I'd lean more towards the help rather than hindrance side in Google's case.
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greenleaves
Joined: Mar 21, 2002
# Posts: 720
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Posted: 2004-Mar-18 15:17
I just typed in a lonf message and lost it in my browser, urg, frustration.
I will brief it. Doe to what i am trying to explain isn't simple i will continue using the example of :
"If site-X has a 3rd person add (served up by a script) on site-Y and spider-Z reads site-Y, then the add of site-X on site-Y will not affect the ranking of Site-X. The spider cannot read the incoming link for site-X doe to the fact that the add of site-X on site-Y is a script link. This would mean that the ranking of site-X would not be affected. Am I wrong on this? If so, someone please tell me 'cuz this means a lot to me. "
I never argued that the spider will count the add on site-Y as an out going link for site-Y. I din't argue this because I don't really know and haven't botherd to find out.
But I don't think spider-Z can read which URL is on the third person outgoing ad link on site-Y and much less follow it. Also, even if spider-Z could read wich url is on the third person add on Site-Y, the url of the ad is generally a rederect and therefore, it would not count as part of the link popularity of Site-X. And if the link of site-X on Site-Y doesn't count as part of the link popularity of site-X, I don't see how it can affect the ranking of site-X.
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