Once in a while. Some domains are reserved for certain types of organizations or folks residing in a specific city, state or country. Another rule to keep in mind is that some of your contact information must display publicly in the WHOIS database. But don’t worry. You can always opt for Domain Privacy & Protection when you register your domain name. How To Choose the Best Domain Names
Basically, almost all the domain names have been registered at some point in the past, so the chances are that the domain name you’re trying to register has already been used by somebody else in the past. This sometimes means that the past owner might have posted illegal things, or adult stuff, scams, spammed, etc…thus Google and other search engines blocked it from ever appearing in the search engines ever again.
As an example, let’s consider Shopify – a premium eCommerce website builder. Over the years, Shopify has become quite a heavy and complicated e-store creator. Its focus on adding more technical capabilities has transformed the visual editor from something a beginner could use, to something that can intimidate a beginner. Today, nobody recommends Shopify as a relevant e-store builder for newbies.
There's a rule in advertising that says when launching a new product, you need to start by making a list of ten names. The first three are easy. Maybe you can do five or six without breaking a sweat, but by the time you get to last one, you'll be stuck for more ideas. Using the outline described above, choose the best one from your list and you are on your way. Don't be afraid to ask some friends what they like. That's the best way to help choose your domain name!
Is the domain name REALLY that important fo SEO? I googled ‘choosing domain’ and found this post. I clicked on the title of the post (which is what is highlighted in bold in the results) before I even knew your domain name. No one is going to Google websitesetup.org because no one knows you exist until they find you based on the content they were looking for.