Google defines a good link as an “editorial” link; that is, a link a webmaster naturally posts to share a value with his/her readers, or to provide a recommendation. With all the new shorthand messaging services around, smaller viewing screens in smartphones, smarter analytics technologies, and the fleets of new savvy web users communicating in a whole new web-language, shortened URLs are becoming incredibly popular. You’ve seen them all over Twitter. This is a perfect example of an arena where editorial links are extremely abundant. Google should love them!
So why is it that so many don’t pass link value? Granted, many are technically built with 302 redirects, but engines have the discretion to treat a 302 redirect as a 301 redirect. Still, most SEOs would agree that they’re not seeing much – if any – SEO boost from the shortened URLs as a whole. I can’t say I’ve definitely noticed any link love myself. But until I did my homework, and realized there were more 301 redirect shortening services than there used to be, I may not have been using the right service anyway. So let me show my work a little bit…
10 popular shortening services:
Before you pick a shortening service willy-nilly, maybe think about whether you’re looking for link value or not. This doesn’t guarantee Google will follow the 301 redirect that is built into some of these shortening services, but it’s the best chance you have. The following are 10 of many. This list was pulled out of TweetDeck, currently my favorite Twitter messaging tool.
| Service | SEO Friendly? |
| TinyURL | Maybe – it’s a 301 but does not appear to pass link value (see update below) |
| Bit.ly | Yes |
| budURL | No |
| Kl.am | Yes |
| Eweri | No |
| Hex.io | No |
| idek.net | No |
| is.gd | Yes |
| lin.cr | No |
| SnipURL | Yes |
| Twurl | No |
The shortening services usually don’t let you add keywords to the URL (though some do – TinyURL lets you add a custom alias). And yes, shortened URLs can be used for SPAMMING too, but what is natively built into Google’s SPAM filtering algorithms would surely be able to evaluate these shortened links too. One cool thing is that many of these services give you basic tracking of a shortened link via a free account registration (some of which let you kill the link to control timely promotions or temporary pages). Definitely useful and valuable in some applications I suppose.
*** Update: 3/18/09
Oggie mentioned this link in the comments:
http://sharkseo.com/google/tinyurl-does-not-pass-value/
So after some testing, Shark SEO says TinyURL does not pass link juice despite the 301. At least anchor text relevance. Is this due to something in Google, or something triggered by the TinyURL service? I’m going to try to test this out myself, but I think I’ll stop using TinyURL as my link shortening service of choice.
SEO Friendly Link Shortening Services
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zi.ma uses 301 re-directs, offers URL customization and even has reporting
TinyURL doesn’t pass a follow to your site. No link juice.
Actually, TinyURL does appear to 301s actually:
http://tinyurl.com/2lz
HTTP/1.0 301 Moved Permanently =>
Connection => close
X-Powered-By => PHP/5.2.8
Location => http://www.amazon.com
Content-type => text/html
Content-Length => 0
Date => Wed, 11 Mar 2009 05:08:55 GMT
Server => TinyURL/1.6
TinyURL does not pass juice even with a 301 redirect. See the lowdown on this blog: http://sharkseo.com/google/tinyurl-does-not-pass-value/
Thx for the article Bill!!!
Oggys last blog post..Go-ref – 2009-03-12
@Oggy: Interesting. I started a test too; this looks like something worth investigating deeper. I’ll update my post.
Great useful post.
Anybody done any research on whether su.pr passes link juice? I know a lot of people don’t use it because the frames are annoying, but it does have some nice analytics that I don’t see in other link shorters.