How to group Philips Hue lights?

In Nexus Home App:

1. Tap on Devices.
2. Select Add Device. Under Add A Device, select Light.
3. Tap Color Control and select Philips Lights. Under Philips Lights, select Philips Hue Group.
4. Select your bridge and tap on Next. Select the desired number of lights in order to group. You must select a minimum of two lights to create a group.
5. Enter a name for the group and Location. Tap Done. If you would like to add more groups tap on Ok else tap Cancel.