What is the purpose of "minisites"?

[Dwaltin]

I know this could possibly go in the Website forum but I felt like it was a newbie question so sorry ahead of time if it shouldnt be here.

Ive read posts about people will park their domains, and then set up a mini website on them when they have time.
What is the point of this? Advertisement?
And what are some sites to register your site to search engines?
For minisites do you need to buy hosting too?
Can a domain still be parked and getting revinue per click w/ a minisite running?

I will greatly appretiate any help you can offer.
Thanks!

 

[midnight251]

Thanks again RSK. I think I'll see what I can do and develop that site. First time for everything....