SEO is rife with a lot of myths, and one of the king of these is that edu and gov links send better link juice than .coms and everything else. Perhaps “myth” is taking it to far because no one is really sure how exactly Google measures page rank. So a lot of search engine optimization is based on speculation, not proof. One person might say edu links have increased there SERPs for certain keywords, others say the opposite. And the first person might not be factoring in other link building efforts via .coms that might be contributing to a better positioning.
You’d think Google’s Matt Cutt’s own words would have silenced the issue, but it hasn’t. He has said, “There’s no special “Yahoo boost” or edu-boost or gov-boost. Those links just tend to be higher quality.”
Really, this makes sense. Why should one site have a “better” page rank than another? Wouldn’t that site just be given a higher page rank instead? Two sites with a page rank of 7 must send equal link juice – so long as each site has the equal number of outbound links on the page. The confusion likely arose from the fact that edu and gov links have an easier time establishing authority – hence Cutt’s reference to “higher quality.” In other words, the majority of them do have better rank relative to .coms. Anyone can set up a .com or .net, but not everyone can set up an edu. Therefore, edu’s are better able to gain page rank than other types of sites. But just because it’s easier to establish page rank does not mean that the site sends more page rank your way.
I’m not making any final declarations on this because the jury’s still out, but this to me makes the most sense. A student’s edu page with a page rank of zero should not have more authority than another website with a page rank of zero. Zero is zero. In short, the top level domain is not the determining factor.
What is the determining factor is the page rank of the page and the number of outbound links. So if you’re able to score a link from an edu site with a good page rank and limited number of links, then great, you’ve done well. But the same thing applies to .coms or any other top level domain. That said, it is a good idea to get links from sites with varying TLD’s because this is a further illustration of your site’s authority. You’re linked from varying types of sites: the web likes you.
The Page Rank of Outbound Links to Edu’s and Gov’s
I periodically do content work for a content production firm that requires outbound links only to edu’s, org’s, and gov’s. Part of this is so that the pages don’t link to any competing .coms, but part of it is also because linking to a high-quality edu or gov is supposed to be better for your authority than linking to a standard .com.
The principle in this case remains the same – linking to a site with a high page rank (i.e. has already established authority) is a good idea if it’s a .com or any other TLD. It will enhance your site’s authority by being part of a network of other quality sites in the same domain. It’s not necessarily better for me to link to this .gov site about SEO, rather than a site like SEOmoz.
Does this mean that you should only link out to site’s with a high page rank? Not at all.
Linking to other blogs – even if it’s a PR 0 – will help start relationships that can lead to backlinks in the blogosphere. You could go a little nuts only linking to high PR sites, which could actually diminish the number of backlinks you can generate. Only a few sites have very high page rank and those sites are the least likely to link back to you, as their links are at a premium and they’re too busy to look at your new site. Overall, you should be linking to good-neighborhood sites, but if you limit your linking only to edu, gov, and high PR .coms, you run the risk of boxing yourself into a corner.
How to Get Edu and Gov Links
OK, I’m sure this isn’t stopping anybody from pursuing edu’s or gov’s. And as I’ve said, having edu’s in the mix can only help, not hurt, so why not add it as part of your link building program. One method that’s thrown around online is to put this search string in Google:
site:.edu inurl:blog “post a comment”
It works. There are plenty of edu-affiliated blogs and other sites where you can add links. However, the problem with most edu comment pages is that the majority of edu’s use nofollow for comment links.
Do the same thing for government sites:
site:.gov inurl:blog “post a comment”
Gov’s are even more difficult: most are nofollow, require a separate log-in, and often have no space to add a url. Edu’s are much easier.
Of course, the really prized links are those within a post or page on page on an edu – as is the case with the web in general. Comment links just don’t send that much rank. You need to be a little aggressive with your site marketing. If an edu or gov site is covering something in your niche, you can contact the webmaster and (politely) ask to include your link in the page. Don’t just expect it to happen without taking the initiative.
Otherwise, buying these links doesn’t make a lot of sense because edu sites can be transitory. Often, they’re taken down in the future – which really means you’re renting a link, not buying it. And given what I’ve said about the value of .gov’s and edu’s relative to high page rank .com’s you might be spending your money thinking that you’re getting back more value than you really are.