Creating a speaker group using Chromecast is a fantastic way to amplify your audio experience. Before diving into the setup process, ensure that your mobile device and WiiM device are connected to the same Wi-Fi network for seamless device integration.

Important Preliminary Step: Before creating your Chromecast Speaker Group, it's essential to add your WiiM device to a room. If you're unsure how to do this, please refer to this helpful article for guidance.

Now, let's get started with the Chromecast Speaker Group setup:

1. Launch the Google Home App: Start by opening the Google Home app on your mobile device. Make sure you are signed in with your Google account.

2. Access Settings: In the Google Home app, tap on the 'Settings' tab. This is where you can manage your devices and groups.

3. Navigate to Devices, Groups & Rooms: Within the Settings menu, look for the 'Devices, groups & rooms' section. You'll find this by clicking on the arrow icon located to the right of the section title.

4. Select Your Devices: You will see a list of available devices. Go through this list and choose each device you wish to include in your speaker group. As you select a device, a tick mark will appear next to it, indicating your selection.

5. Create Your Group: After selecting the desired devices, tap 'Next'. You will then be prompted to give your new speaker group a name. Choose a name that is easily recognizable and relevant to its use.

6. Save and Enjoy: Finally, tap 'Save' to complete the setup of your new speaker group. Your devices are now linked, allowing you to enjoy a synchronized audio experience across multiple speakers.

Remember, you can always modify your speaker group later by adding or removing devices through the Google Home app. Enjoy your enhanced audio setup!