Google Home is getting a old fashioned but needed update of letting users stream the content on Home via Bluetooth. Yes, it is a old school thing but it is a feature that most of the Google Home users want.
As announced at Google IO 2017 that they are bringing the Bluetooth streaming feature and here they are. Until now, users were using it via internet or through Chromecast app. Google has ended this dependency.
Users, can simply connect it with bluetooth as like of any other  device. Well, after connection, you can route any media through bluetooth to the Google Home supportable media.
It is rolling out slowly to the Google. Many users are posting about the same update on different forums over the web.