Google Anaylics Question

Setting up Google Analytics for a client's website. Do I just add any account name? Can't find anything on the web how to fill in the other boxes either. This is for a client.

I also may have other clients so hopefully my account can add them all? Not sure how to go about this or what's best to put in the boxes. I only used it in the past for my own accounts.

Keep in mind I may have to sometime in the future hand over the site maintenance to someone else.

Hopefully not a problem for Google Maps either which is already installed.