From Paterva Wiki
A web site is simply an special type of DNS name. Maltego sees these as two different types because there are many website specific transforms.
Learn more about this entity
Website on Wikipedia
See also (other entities)
Properties of this entity in Maltego
(URLs) If a search engine transform has been executed URLs will be collected in this field for later use (like the 'dump to URLs' transform)
(Open HTTP port) a list of comma seperated ports where HTTP server are listening. Currently only port 80 is tested
(Open HTTPs port) Same as above but for SSL-enabled HTTP service. Currently only port 443 is tested
(Server type) The version of the HTTP server.