If you need to reduce the resource consumption in your system because, for example, you might not be interacting with the app, you can enable the background mode.
This is especially important in computers that do not meet the minimum requirements.
Activating Background Mode will limit interactivity, but you will still hear the environmental sound and voices, and you will be able to answer and be heard too.
When you enable this mode, an icon will be shown on top of your avatar, so that people around you know that you are using the app in background mode.
In order to resume normal functionality, you just need to press any key or click anywhere.