: Detecting whether banner ads pass link juice I wanted to determine the relative SEO value of the advertising links passed by this website: http://www.garden.org/. On the right side you'll notice
I wanted to determine the relative SEO value of the advertising links passed by this website: www.garden.org/.
On the right side you'll notice several advertising banners that, when clicked, redirect you to the appropriate website. If you inspect any of these banners you'll notice that while the a href has a bunch of the usual ad garbage in the URL, there's nothing in there that's nofollow.
Why is it that when I check out any of these site's backlink profiles (via OpenSiteExplorer) that I can't find any trace of backlinks from garden.org?
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Hi NotMuchOfAProgrammer,
It's not a real backlink since the JavaScript is injecting the URL after the page has been loaded. If you disable JavaScript you will see:
<noscript>
<a href="http://ads.garden.org/www/delivery/ck.php?n=aa4a0d78&cb=INSERT_RANDOM_NUMBER_HERE" target="_blank">
<img src="http://ads.garden.org/www/delivery/avw.php?zoneid=104&cb=INSERT_RANDOM_NUMBER_HERE&n=aa4a0d78" border="0" alt="">
</a>
</noscript>
Which has no backlink ;).
Most sites that you buy space for advertising will use a JavaScript, Redirect, Flash Ad or a simple nofollow. Good sites do this because selling of links is against Google's policy and they actually downrank their in rankings and PageRank if they are caught doing so.
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