for Metadata : http://forums.adobe.com/message/4332431#4332431
Basically, in Plan view, right click the page you want to add Metadata to, click "Page Properties" click "Metadata" button on the upper right hand side. This is where you can add your key words, descriptions and add the offical name to your page in case you want it differently than you named it whilst designing. For example "Home" on the site plan can now become "Peter Maloney | Commerical Photographer | Dublin"
Your Google Analytics script would need to be manually inserted into the header script. You can't do this within Muse, you would need to do it with an HTML editor after exporting your HTML, CSS and image files from Muse. Alas, this means that every time you update your site, you would need to manually tweak the output each time...
Google has some information about where to put the tracking code here:
Beware that meta descriptions and sitemaps are not considered as much as the actual readable content on your pages.
If you are designing a Muse site with more graphics than readable text, you can expect your site to be ignored by Google.
Google Analytics has a couple types of scripts. There is a variation that does not need to be placed in the header. It could be inserted with Muse's "arbitrary HTML" insert function, which places your own HTML/CSS/JS within the body. Google recommends that it is placed right before the closing BODY tag but Muse offers no real control on this. So you are stuck with wherever it falls.
I am begining to see some shortfalls with Muse. As a photographer with a good knowledge of Photoshop, Muse has a family attraction. But this HTML stuff is a head wreck!
My new site has most of its text (description of me and my work) on the home page so I'm hoping all other things being equal, Google will pick up on this!