WordPress is one of the most popular content management systems (CMS) in the world, and as such, many web hosting providers offer options that cater to this rather large niche. You can certainly host your WordPress site on a standard shared hosting plan, but by choosing a WordPress-specific option, you'll spend less time configuring and managing your WordPress installation.
Simple websites are best for low to medium trafficked sites with multiple authors and more frequent content changes, such as marketing websites, content websites or blogs. They provide a simple starting point for website which might grow in the future. While typically low cost, these sites require IT administration of the web server and are not built to be highly available or scalable beyond a few servers.
For example, only organizations can register a “.org” domain name, and only American citizens can register a domain name that ends in “.us.” Failing to meet the guidelines and requirements for each type of domain during the actual registration and payment process will result in the domain name being “released” back into the pool of available domain names; the customer will have to pick a top level domain for which they actually qualify, or cancel their purchase altogether.