EDIT: Thanks to everyone who replied, I do have a cleared idea now. This video was particularly helpful: http://www.youtube.com/watch?v=KRvbFpeZ11Y
So the way I'd describe this to myself to make sense of it is it's a content management system for third-party Javascript code snippets. The focus appears to be on Google services (Analytics, AdSense, etc.) but from the video it appears you can use third party code as well.
I find it slightly odd that it's "pitched" to marketers (I'm quite certain none our marketers are going to do regex matching to contextually place snippets on certain pages), so I'm more interested in whether it adds benefits to the developer and/or the end user.
Does it slow down or speed up page load times and responsiveness? Is it configurable for more "complex" snippets (both sync and async, etc)? I'm thinking about chartbeat e.g., where you have a snippet that runs at the top of the page to grab a timestamp, and the rest of the snippet runs at the end.
If it really does help wrangle and manage all of these code snippets without harming the user experience it might be worth investigating...