I have developed a website which is like a web application. A user has to log-in to visit/view the next pages. 

I want only the login page to be found out by Google. The SEO guidelines that I got online are more for blogs or websites which have many open pages.

I am not getting a clue how to proceed. If I search for my website name on Google, the description still shows the goDaddy page stating "click here to find out how to purchase this domain name."

Need help desperately.