Spanner in the works now.
No spanner. Merely a difference of opinion, one that I do not necessarily agree with.
The SEO value of a keyword rich domain name is minute when compared to other ranking signals like the page title.
The real value is it's use as anchor text for inbound links but only if the words are separated with a hypen
I created my
keyword rich domain SEO experiment because at the time I wanted to find out why keyword rich domains were beginning to suddenly rank so highly in 2007/2008. A lot of people said it was because of the natural anchor text in inbound links where just the domain name was the anchor text but I didn't believe this, because:
1. If I was designing a search engine I wouldn't assign any anchor text to a link where the visible element is the web address, because that isn't really a hyperlink with alternative meaningful words instead of a web address.
2. If this was the case, then there wouldn't have been a sudden ranking improvement for keyword rich domains in 2007/2008, they would have had the improvement all along and before 2007/2008
The main point of my experiment was to prove that no anchor text was passed on when a domain web address is used as anchor text. In the end, the results surprised me because anchor text was being passed on, but only in certain cases. Notably the case where anchor text was not being passed on was in the case of multiple word non-hyphenated domain names like bluewidgets.com.
But it was those domains like bluewidgets.com which started getting the ranking boost around 2007/2008. And without any benefit from web address inbound links, this leaves the explanation for this ranking boost firmly at a change in Google's onsite-SEO ranking algorithm giving quite a boost when keywords are in the domain names, possibly a boost similar in magnitude to a title, especially for exact match domains.
But I should also say, that just as Google giveth, it can easily taketh away too in the future.
or underscore as Paul suggests (G treats these as spaces).
Whilst I briefly mentioned underscores as an example of word separators, I have not conducted any definitive tests yet on underscores in full urls of pages (underscores in domain names are not allowed). After my surprise with the last experiment, I wouldn't like to say either way whether a particular search engine like Google treats underscores as word separators in what areas (urls, inbound links, on-page content, etc) until experiments have been carried out.
For the purpose of this thread, i.e. domain names only, underscores do not matter since you cannot have an underscore in a domain name.
Google does not treat an
underscore as a space, this is a well documented fact.
That original Matt Cutts blog was from 2005, and since then Google have given out different signals, like
announcing they were supporting underscores as word separators in 2007, to going quiet after then, and eventually
saying in early 2009 that what they said in 2007 didn't happen but might happen in the future! There are still
good reasons aside from SEO (writing for people rather than writing for the search engines) for using underscores.
But since underscores cannot be used in domain names they have little bearing on a domain name discussion, but are more relevant for a thread about what you put in the url after the domain name, a thread about deep linking (inbound links to individual pages in a website, rather than inbound links to just the domain), and a thread discussing what is the relative ranking value of the url to the right of the domain name as opposed to the domain name itself.