This is good and all States should adopt some. Eventually I’d like to see one at the federal level that supersedes state level ones so that we don’t have to deal the the mess that is taxation across 50 states. A nice uniform privacy bill at the Fed level would be nice.

Will this have reach and teeth though?

I can imagine loopholes to this... nothing stops facebook/google from buying this data from companies not in Massachusetts? and facebook/google don't have to give advertisers the location information but can still use that information when determining the advertisement to return, right? In theory the big silicon valley "targets" of this bill don't actually have a huge incentive to give this data away, do they? They just need to be able to read/access it, which I don't think this law stops? Assuming the data broker is not doing business in Massachusetts itself

This is very exciting.