Auto-settlement allows you to bypass the need to settle payments manually once they have been locked by the receiving institution.
To activate auto-settlement:
In Ripple Payments UI, click the Settings tab.
Click Payment settings.

On the Auto-settlement panel, turn on the switch.

In the Activate Auto-settlement? modal, click Activate.

Auto-settlement is now activated for all payments.
Deactivation
To deactivate auto-settlement, follow steps 1 and 2 in the above procedure, then in step 3, turn off the switch on the Auto-settlement setting panel.