The author of 'Prioritizing Web Usability' is Jakob Nielsen. Nielsen, a usability consultant, was born in Copenhagen, Denmark in 1957. He holds a Ph. D. in human-computer interaction.

An application similar to web usability is Facebook. It requires the web in order for persons to use the program. Many gaming sites are applications of this nature as well.

Graphic design as a whole is how things look - anything that is not text is graphic design. So for example logo design, designing the next doritos chip bag, hard rock cafe buttons, etc. So anything on a site like a logo or picture would be graphic design.

Web page design is more about usability and the layout of the page - great web designs follow certain rules and customs to make the web site comfortable to browse - the whole idea of web design SHOULD follow the idea of usability because the goal is to keep the user on the page as long as possible. Web design should really be about web usability (a good author on this subject is Jakob Nielsen)

It's designing the website for the user. There is a great article here.

http://www.rankbetterseo.com/blog/simple-usability-best-practices-to-keep-in-mind-when-designing-a-website

Web Site

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web site

It is a web site.

that is wrong wrong wrong and wrong again