What is Ambient Mode/How do I use Ambient mode on my Philips Google TV?

When your Philips Google TV is not being used, it can quietly keep you entertained with Ambient Mode. You must be signed in to your Google account in order to set up and configure Ambient Mode.
Note:

• Ambient Mode allows Chromecast to access photos, personalized content, and preferences associated with your Google account.
• You can access and manage Ambient Mode preferences from the Google Home app. 
• All Ambient Mode preferences associated with your Google TV will be removed when you perform a factory reset on the associated Google TV
• The maximum resolution of Ambient Mode on Chromecast Ultra devices is 1080p.