Good question! We already had a feature called "greeter" that was on par with snapengage's proactive chat. Targeting is something bigger.

Targeted chat lets you take a variety of actions other than just automatically starting conversations (label visitor, hide chatbox, show chatbox, route to operator/group) based on a wider variety of conditions about the user (too many to list here).

Take it for a spin and let me know if you have any more questions! Always happy to help.

Anyway to make it so that if a user tries to abandon our shopping cart by clicking back or X out of the page the chat box will popup asking if they need any help?

Do you really want to override browser functionality? I could imagine more people being frustrated by that than the additional sales it may generate.

From the demo, they offer a rule based on referring and current URL (you may be able to use this in order to determine if a user has already pressed back). Nothing I can see regarding closing the window, your best bet may be to use the given example: "number of seconds user is on page".