The rocket was carrying the Amos-6 communications satellite, which was destroyed in the explosion. This satellite was owned by Israeli company Spacecom and valued at nearly $200 million.
Very valuable. It contained a Facebook satellite (actually a French one) that was to provide internet connectivity to Africa.
By some measure they all are very valuable, but it wasn't a NASA flagship mission or human beings, for example. Most importantly, the public didn't care.