I am unsure of where I need to install the dashboard in my online empire!

Hi,

I am in the Internet Marketing arena, but are fairly new to this game.

I have just purchased your annual membership to help with website development and to take advantage of your support at times (hopefully less as time goes by) .

I have a number of domain names I wish to use, plus I want to use several wordpress installations on each domain using various sub-directories.

Do I need to install the dashboard and plug-ins on every wordpress installation?

Also, I don't know much about multi-site. Would this be useful to me, or is it for deploying similar sites for different users?

Thank You,

Terry