The webmaster of a website or blog safely is read many times on this subject, does it matter which domain name to your website or blog? And may not have very clear answer.
When we refer to the domain name to say that the name has keywords that will develop later in your website or blog.
For example, if you develop a business website or blog, ideally your website or blog has negocios domain name (it is just one example, sure the domain is already taken).
Some experts say they now no longer makes much of the domain name, is that it is very important that your domain name with one or more keywords in your niche to develop.
This, in my opinion is partially true, only in part, because in my own experience I can verify that it is still important to try your domain name has a keyword in your central theme. And this is more important for new sites or blogs.
I was able to verify that a good domain name can come back to compete for the top spot on Google with older, well-positioned pages, is pages with high page rank.
Perhaps after positioning your website or blog your domain name and does not have the same role at the beginning of it, since other factors such as time of the site, pagerank, alexa rank will be higher than your domain name and play a major role in story to positioning, but at home it is advisable to have a good domain name.