When you group two or more Sonos products together, they act as one speaker system. That means you can play the same song in every room, or different songs in different rooms.
You can also adjust the volume of each individual product in the group, independently from the others. For example, if you have a living room and kitchen grouped together, you can turn the volume up in the living room without affecting the volume in the kitchen.
To create a group, open the Sonos app and select Add Group from the Settings menu. Then drag and drop the products you want to include into your new group. Once your products are grouped together, tap Done.
If you ever want to remove a product from a group, simply drag it out of the group back into its own category (e.g., Living Room).