What does this "Website Developed" mean?

When you see the sign next to a domain, it means that the domain has a unique site attached.

This will mean the site is indexed and optimised for its intended purpose on the search engines.

Where ever you see the sign this does not mean you are entitled to the site design should you wish to purchase the domain.

It simply means there is already a web presence for the domain and already it will be taking hits/vistors, which you would benefit from more than a freshly registered domain name.

The benefits of acquiring an established domain are plentiful.