Out of the box artefacts that read this property. Append the path to your instance URL to open the record and see how the value is used.
Business rule: Polaris follow event queue
When Polaris is enabled, this setting controls whether the follow-event rule runs: true enables it, and false disables it. If unset, it defaults to true.
/sys_script.do?sys_id=02af2d1f77aa1110866ea2059f5a99c8
UI action: Follow on Live Feed
When the Polaris interface is enabled, this setting controls whether users can see or use “Follow on Live Feed”; when disabled, it prevents the action, while users outside Polaris are unaffected. Its default is true, and the action still requires the record to support Live Feed and the user to have permission to follow it.
/sys_ui_action.do?sys_id=7d95e12137302000dada8cdabebe5d7d
UI action: Follow on Live Feed
The Follow on Live Feed action checks this setting when Polaris is enabled: true allows eligible users to see or use the action, while false disables it; when Polaris is disabled, the setting has no effect. The default is true, and following still depends on the item meeting the other eligibility and access checks.
/sys_ui_action.do?sys_id=ddbf640437412000dada8cdabebe5d21