A favicon is an image that can be used to replace the Salesforce cloud icon in browser tabs.
Administrators can add a favicon to Community Hub from Community Hub Settings.
In the tab bar, click App Launcher.
Search for Community Hub Settings from the search tab in App Launcher.
Go to Customization Settings custom setting.
Click Edit next to Customization.
In Favicon Static Resource Name, enter the name of an image static resource to be used as browser favorite icon in Community Hub. If left blank, the default favicon is the Salesforce cloud icon.
