How do I setup automatic invitation?

Click on tabs:
1. Tab: Admin
2. Tab: Customize
Choose “Invitation Window” (if not already selected).

Invitation window settings - HelpOnClick

Method – choose how long to wait until the invitation message pops up (30 seconds should usually be a good choice).
Default message – this is the default invitation message (can be overridden by each operator).
Untick “When widget presents, show invitation inside it” to get a full screen invitation message in a lightbox to get the full attention of the visitor.
Goes to – choose the target of the invitation window.