mySQL and cPanel

I am new to the whole hosting/PHP programming thing. I am wondering how many mySQL databases would I need if I wanted to set up a forum, news/blogs, image galleries etc. Does every one of these require its own?

And when hosts say unlimited mySQL databases, is this realistic (because for bandwith and space it is but too obvious).

Also why is cPanel looked upon as the best and what does it offer (link?)...

Thanks!

 

 

 

 

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